A class of compounds of the type R-M, where a C atom is joined directly to any other element except H, C, N, O, F, Cl, Br, I, or At. (Grant & Hackh's Chemical Dictionary, 5th ed)
A hard, brittle, grayish-white rare earth metal with an atomic symbol Ru, atomic number 44, and atomic weight 101.07. It is used as a catalyst and hardener for PLATINUM and PALLADIUM.
Chemicals used in agriculture. These include pesticides, fumigants, fertilizers, plant hormones, steroids, antibiotics, mycotoxins, etc.
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
The study of the physical and chemical properties of a drug and its dosage form as related to the onset, duration, and intensity of its action.
Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.
Organic compounds composed exclusively of carbon and hydrogen forming a closed ring that may be either alicyclic or aromatic.
Compounds that provide LUBRICATION between surfaces in order to reduce FRICTION.
Organic and inorganic compounds that contain iron as an integral part of the molecule.
Board members of an institution or organization who are entrusted with the administering of funds and the directing of policy.
A cyclodecane isolated from the bark of the Pacific yew tree, TAXUS BREVIFOLIA. It stabilizes MICROTUBULES in their polymerized form leading to cell death.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
Computer disks storing data with a maximum reduction of space and bandwidth. The compact size reduces cost of transmission and storage.
Pollutants, present in soil, which exhibit radioactivity.
Books used in the study of a subject that contain a systematic presentation of the principles and vocabulary of a subject.
A historical and cultural entity dispersed across a wide geographical area under the influence of Greek civilization, culture, and science. The Greek Empire extended from the Greek mainland and the Aegean islands from the 16th century B.C., to the Indus Valley in the 4th century under Alexander the Great, and to southern Italy and Sicily. Greek medicine began with Homeric and Aesculapian medicine and continued unbroken to Hippocrates (480-355 B.C.). The classic period of Greek medicine was 460-136 B.C. and the Graeco-Roman period, 156 B.C.-576 A.D. (From A. Castiglioni, A History of Medicine, 2d ed; from F. H. Garrison, An Introduction to the History of Medicine, 4th ed)
Spectrophotometric techniques by which the absorption or emmision spectra of radiation from atoms are produced and analyzed.
Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.
A group of chemical elements that are needed in minute quantities for the proper growth, development, and physiology of an organism. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Analysis of the energy absorbed across a spectrum of x-ray energies/wavelengths to determine the chemical structure and electronic states of the absorbing medium.
A metallic element of atomic number 30 and atomic weight 65.38. It is a necessary trace element in the diet, forming an essential part of many enzymes, and playing an important role in protein synthesis and in cell division. Zinc deficiency is associated with ANEMIA, short stature, HYPOGONADISM, impaired WOUND HEALING, and geophagia. It is known by the symbol Zn.
A molecule that binds to another molecule, used especially to refer to a small molecule that binds specifically to a larger molecule, e.g., an antigen binding to an antibody, a hormone or neurotransmitter binding to a receptor, or a substrate or allosteric effector binding to an enzyme. Ligands are also molecules that donate or accept a pair of electrons to form a coordinate covalent bond with the central metal atom of a coordination complex. (From Dorland, 27th ed)
Shortened forms of written words or phrases used for brevity.
Porphyrins which are combined with a metal ion. The metal is bound equally to all four nitrogen atoms of the pyrrole rings. They possess characteristic absorption spectra which can be utilized for identification or quantitative estimation of porphyrins and porphyrin-bound compounds.
Organic compounds that have the general formula R-SO-R. They are obtained by oxidation of mercaptans (analogous to the ketones). (From Hackh's Chemical Dictionary, 4th ed)
A prodromal phase of infection with the human immunodeficiency virus (HIV). Laboratory criteria separating AIDS-related complex (ARC) from AIDS include elevated or hyperactive B-cell humoral immune responses, compared to depressed or normal antibody reactivity in AIDS; follicular or mixed hyperplasia in ARC lymph nodes, leading to lymphocyte degeneration and depletion more typical of AIDS; evolving succession of histopathological lesions such as localization of Kaposi's sarcoma, signaling the transition to the full-blown AIDS.
The voluntary portion of Medicare, known as the Supplementary Medical Insurance (SMI) Program, that includes physician's services, home health care, medical services, outpatient hospital services, and laboratory, pathology, and radiology services. All persons entitled to Medicare Part A may enroll in Medicare Part B on a monthly premium basis.
Neutral or negatively charged ligands bonded to metal cations or neutral atoms. The number of ligand atoms to which the metal center is directly bonded is the metal cation's coordination number, and this number is always greater than the regular valence or oxidation number of the metal. A coordination complex can be negative, neutral, or positively charged.
Compounds based on a seven-membered ring fused to a five-membered ring. Heat can rearrange them to NAPHTHALENES which have two fused six-membered rings. They are similar to guaiazulenes which are SESQUITERPENES with a six-membered ring fused to a five-membered ring.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed)
An allotropic form of carbon that is used in pencils, as a lubricant, and in matches and explosives. It is obtained by mining and its dust can cause lung irritation.
Diamond. A crystalline form of carbon that occurs as hard, colorless or tinted isomeric crystals. It is used as a precious stone, for cutting glass, and as bearings for delicate mechanisms. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)
Electrical devices that are composed of semiconductor material, with at least three connections to an external electronic circuit. They are used to amplify electrical signals, detect signals, or as switches.
An element of the rare earth family of metals. It has the atomic symbol Y, atomic number 39, and atomic weight 88.91. In conjunction with other rare earths, yttrium is used as a phosphor in television receivers and is a component of the yttrium-aluminum garnet (YAG) lasers.
Zirconium. A rather rare metallic element, atomic number 40, atomic weight 91.22, symbol Zr. (From Dorland, 28th ed)
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
The study of the structure, preparation, properties, and reactions of carbon compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

Oligonucleotide-europium complex conjugate designed to cleave the 5' cap structure of the ICAM-1 transcript potentiates antisense activity in cells. (1/3714)

The 5' cap structure of mRNA is a N7 methylated guanosine residue that is linked by a 5'-5' triphosphate linkage to the 5'-terminus of cellular and viral RNAs synthesized by RNA polymerase II. This unique structure facilitates several processes of mRNA metabolism, including splicing, nucleocytoplasmic transport,initiation of translation, and degradation. Previous research has demonstrated that the lanthanide macrocycle complex, Eu(THED)3+, effectively cleaves the 5' cap structure of mRNA in solution by nucleophilic attack of the triphosphate linkage via the metal-activated hydroxyethyl group of the THED ligand. This report shows that attachment of a Eu(THED)3+analog to the 3'-terminus of an antisense oligonucleotide, which targets the 5'-terminus of the intercellular adhesion molecule 1 mRNA, potentiates the inhibitory activity of the antisense oligonucleotide in cytokine-treatedendothelial cells.  (+info)

Antimicrobial activities of synthetic bismuth compounds against Clostridium difficile. (2/3714)

Clostridium difficile is a major nosocomial pathogen responsible for pseudomembranous colitis and many cases of antibiotic-associated diarrhea. Because of potential relapse of disease with current antimicrobial therapy protocols, there is a need for additional and/or alternative antimicrobial agents for the treatment of disease caused by C. difficile. We have synthesized a systematic series of 14 structurally simple bismuth compounds and assessed their biological activities against C. difficile and four other gastrointestinal species, including Helicobacter pylori. Here, we report on the activities of six compounds that exhibit antibacterial activities against C. difficile, and some of the compounds have MICs of less than 1 microgram/ml. Also tested, for comparison, were the activities of bismuth subcitrate and ranitidine bismuth citrate obtained from commercial sources. C. difficile and H. pylori were more sensitive both to the synthetic bismuth compounds and to the commercial products than were Escherichia coli, Pseudomonas aeruginosa, and Proteus mirabilis, and the last three species were markedly resistant to the commercial bismuth salts. Testing with human foreskin fibroblast cells revealed that some of the synthetic compounds were more cytotoxic than others. Killing curves for C. difficile treated with the more active compounds revealed rapid death, and electron microscopy showed that the bismuth of these compounds was rapidly incorporated by C. difficile. Energy dispersive spectroscopy X-ray microanalysis of C. difficile cells containing electron-dense material confirmed the presence of internalized bismuth. Internalized bismuth was not observed in C. difficile treated with synthetic bismuth compounds that lacked antimicrobial activity, which suggests that the uptake of the metal is required for killing activity. The nature of the carrier would seem to determine whether bismuth is transported into susceptible bacteria like C. difficile.  (+info)

Concatemerization of tRNA molecules in the presence of trivaline derivative. (3/3714)

The interaction of tRNA with trivaline dansyl hydrazide trifluoroacetate (DHTV) has been studied. The shape of curves of fluorimetric titration of tRNA with DHTV and vice versa can be explained only by formation of DHTV dimers on tRNA molecules, and subsequent association of DHTV-saturated tRNA molecules with each other. The ability of tRNA molecules to form concatemers in solution in the presence of DHTV has been demonstrated by electron microscopy. Electron microscopy of the tRNA-DHTV complexes stained with uranyl acetate revealed flexible rods 6-7 nm thick and up to several micrometers long.  (+info)

Determining anomericity of the glycosidic bond in Zn(II)-diethylenetriamine-disaccharide complexes using MSn in a quadrupole ion trap. (4/3714)

Zinc-diethylenetriamine (Zn-dien) N-glycoside complexes of four 1,4 and four 1,6 linked disaccharides are prepared. Each reaction mixture is ionized by electrospray and the resulting species [Zn(dien)(disaccharide)-H]+ is allowed to undergo collision-induced dissociation in a quadrupole ion trap. An MS3 analysis is used to differentiate alpha versus beta anomericity of the glycosidic bond in the disaccharide moiety. In addition, the MS2 and MS3 spectra can be used together to determine the linkage position of this glycosidic bond.  (+info)

Effects of vanadium complexes with organic ligands on glucose metabolism: a comparison study in diabetic rats. (5/3714)

1. Vanadium compounds can mimic actions of insulin through alternative signalling pathways. The effects of three organic vanadium compounds were studied in non-ketotic, streptozotocin-diabetic rats: vanadyl acetylacetonate (VAc), vanadyl 3-ethylacetylacetonate (VEt), and bis(maltolato)oxovanadium (VM). A simple inorganic vanadium salt, vanadyl sulphate (VS) was also studied. 2. Oral administration of the three organic vanadium compounds (125 mg vanadium element 1(-1) in drinking fluids) for up to 3 months induced a faster and larger fall in glycemia (VAc being the most potent) than VS. Glucosuria and tolerance to a glucose load were improved accordingly. 3. Activities and mRNA levels of key glycolytic enzymes (glucokinase and L-type pyruvate kinase) which are suppressed in the diabetic liver, were restored by vanadium treatment. The organic forms showed greater efficacy than VS, especially VAc. 4. VAc rats exhibited the highest levels of plasma or tissue vanadium, most likely due to a greater intestinal absorption. However, VAc retained its potency when given as a single i.p. injection to diabetic rats. Moreover, there was no relationship between plasma or tissue vanadium levels and any parameters of glucose homeostasis and hepatic glucose metabolism. Thus, these data suggest that differences in potency between compounds are due to differences in their insulin-like properties. 5. There was no marked toxicity observed on hepatic or renal function. However, diarrhoea occurred in 50% of rats chronically treated with VS, but not in those receiving the organic compounds. 6. In conclusion, organic vanadium compounds, in particular VAc, correct the hyperglycemia and impaired hepatic glycolysis of diabetic rats more safely and potently than VS. This is not simply due to improved intestinal absorption, indicating more potent insulin-like properties.  (+info)

Biodistribution, radiation dosimetry and pharmacokinetics of 111In-antimyosin in idiopathic inflammatory myopathies. (6/3714)

In view of the established role of 111In-antimyosin in the detection of heart muscle pathology, radiation dose estimates were made for this substance. Biodistribution and biokinetic data were obtained from our studies, which failed to show abnormal uptake of 111In-antimyosin in localized sites of skeletal muscle involvement in patients with idiopathic inflammatory myopathies. METHODS: After intravenous administration of 74 MBq (2 mCi) 111In-antimyosin, gamma camera scintigraphy was performed in 12 adult patients with inflammatory muscle disease and in 2 control patients. Six whole-body scans were performed over 72 h, and uptake of 111In-antimyosin in organs was quantified using an attenuation-corrected conjugate counting method. Residence times in source organs were used with MIRDOSE software to obtain radiation dose estimates. Pharmacokinetic parameters were derived from serial whole-blood and plasma 111In concentrations. RESULTS: The tracer cleared slowly from the circulation, and highest organ uptakes were found in the marrow and liver; kidneys showed the highest concentrations. Uptake was also evident in spleen, the facial image and male genitalia. CONCLUSION: For a typical administered activity of 74 MBq 111In-antimyosin, the kidneys receive the highest dose (58 mSv), and the effective dose is 11 mSv. Radioactivity was cleared from plasma at an average rate of 136 mL/h, and the mean steady-state distribution was approximately 5 L plasma.  (+info)

Oxidized low-density lipoprotein as a delivery system for photosensitizers: implications for photodynamic therapy of atherosclerosis. (7/3714)

Photodynamic therapy is a promising new strategy in the treatment of cardiovascular diseases. Photodynamic therapy for vascular diseases may be improved by the specific delivery of photosensitizers to the atherosclerotic lesion. In this study, we studied whether oxidatively modified low-density lipoprotein (OxLDL) could be used as a specific carrier for photosensitizers, thereby using the scavenger receptor expressed on macrophages as a target. The photosensitizer aluminum phthalocyanine chloride (AlPc) was incorporated into OxLDL, and its photodynamic effects were studied. Macrophages (RAW 264.7) were incubated with various concentrations of OxLDL-AlPc for different periods. After illumination of the cells with red light, cytotoxicity was observed that was dependent on the time of illumination and incubation. Macrophages incubated with OxLDL-AlPc that were not illuminated revealed no cytotoxicity. The uptake of the OxLDL-AlPc complexes was mediated by scavenger receptors expressed on macrophages. In the presence of the polyanion polyinosinic acid, a specific ligand for scavenger receptors, no cytotoxicity could be observed. Serum incubations of the OxLDL-AlPc complexes revealed that these complexes stay intact after incubation. No redistribution of AlPc to other plasma (lipo-) proteins could be detected, and 80-90% of the AlPc remained associated with the OxLDL particle. These results indicate that OxLDL may function as a specific delivery system for photosensitizers to the scavenger receptors expressed on the macrophages in the atherosclerotic lesion, increasing the beneficial effects of photodynamic therapy for cardiovascular diseases.  (+info)

In vitro cell cycle arrest, in vivo action on solid metastasizing tumors, and host toxicity of the antimetastatic drug NAMI-A and cisplatin. (8/3714)

The effects of NAMI-A (imidazolium trans-imidazoledimethyl sulfoxide-tetrachlororuthenate) are compared with cisplatin on tumor cells cultured in vitro at doses of 1 to 100 microM and on tumor metastases in vivo at maximum tolerated doses. Using mouse tumors that metastasize to the lungs, NAMI-A given i.p. for 6 consecutive days at 35 mg/kg/day, was effective independently of the tumor line being treated and of the stage of metastasis growth. Conversely, cisplatin (2 mg/kg/day for 6 days) was as effective as NAMI-A on MCa mammary carcinoma and TS/A adenocarcinoma and less effective than NAMI-A on Lewis lung carcinoma. Cisplatin reduced body weight gain and spleen weight during treatment and was much more toxic than NAMI-A on liver sinusoids, kidney tubules, and lung epithelium. In vitro NAMI-A caused a transient cell cycle arrest of tumor cells in the premitotic G2/M phase, whereas cisplatin caused a progressive dose-dependent disruption of cell cycle phases. Correspondingly, NAMI-A did not modify cell growth, whereas cisplatin caused a dose-dependent reduction of cell proliferation, as determined by sulforhodamine B test. Thus, NAMI-A, unlike cisplatin, is a potent agent for the treatment of solid tumor metastases as well as when these tumor lesions are in an advanced stage of growth. NAMI-A is endowed with a mechanism of action unrelated to direct tumor cell cytotoxicity, and such mechanism of action is responsible for a reduced host toxicity.  (+info)

This thesis focuses on the study of hydrogen dynamic behavior in a series of proton sponge cations as well as in bis(silyl)hydride organometallic complexes. To understand the dynamic behavior, a new tool, i.e. the three-dimensional vibrational Schrödinger equation has been derived and solved. Three different vibrational patterns for hydrogen motion have been revealed. The classification of proton sponges and bis(silyl)hydride complexes into those with localized and delocalized hydrogen behavior has been proposed. For the organometallic complexes the influence of the vibrational motion of the hydrogen on J(Si−H) spin−spin coupling constants has been studied. Also this thesis presents a study of [Cp*Co(SiR3)2(H)2] cobalt complexes and their iridium analogues to detect possible Si···H interactions. Based on molecular geometries, Wiberg bond indices, and J(Si-H) spin-spin coupling constants, at least two residual Si···H interactions have been detected in cobalt complexes while there are ...
Immobilization of two organometallic complexes into a single cage to construct protein-based microcompartmentImmobilization of two organometallic complexes into a single cage to construct protein-based microcompartment ...
June 20, 1967 M. cAls ETAL. 3,326,948 ORGANOMETALLIC COMPOUNDS AND THEIR PREPARATION Filed May l?, 1962 United States Patent C) 5,5 12 Claims. (Cl. 260-429) This invention relates to organometallic compounds of the kind in which at least one transition-metal carbonyl group is bound by a 1r-bond to a hydrocarbon or substituted-hydrocarbon molecule having available 1r electrons. Known compounds of this kind include, for example, cyclopentadienyl compounds such as cyclopentadienyl manganese tricarbonyl. Moreover, dicyclopentadienyl iron compounds are known (usually referred to as ferfocenes) in which an iron, cobalt, nickel or ruthenium atom is bound by fr-bonds to two cyclopentadiene radicals. Such organometallic compounds are suitable for many different technical applications. They may serve, for example, as additives to fuel or to lubricants, as drying agents to be incorporated in drying paints, varnishes, oils or resins, as intermediates in the manufact-ure of metalcontaining polymers, and for ...
Formation of organometallic complexes of platinum(II) and platinum(IV) in reactions of PtCl62− with alkanes, olefins and aromatics induced by γ-irradiation | Mikhail V. Serdobov; Galina V. Nizova; Georgiy B. Shulpin | download | BookSC. Download books for free. Find books
0075]FIG. 3 illustrates a bottom-spraying fluidized-bed granulation system. The spraying nozzle 22 is placed at the bottom of the tank, at the center of the perforated plate or grille 13, and a cylinder 32 is mounted thereon. Spraying of the aqueous solution of organometallic complex is performed from the bottom upward. The apparatus is composed of a conical-shaped removable tank 33 of Wurster type that fits onto the housing of the sleeve filter 15 of the apparatus. The tank 33 comprises a perforated tank bottom plate 13, a cylinder 32 (optional) located in the lower part of the tank above the perforated plate, and the height of which is adjustable, and a nozzle 22 located at the center of the perforated plate 13, under the cylinder 32, and oriented for spraying from the bottom upward. The larger volume of air that pass through the center of the perforated plate 13 and the inner cylinder 32 thereby create an ascending flow 31 of material, which then redescends outward, giving the particles in ...
tats This invention relates to novel organometallic compounds and their preparation. More particularly, the present invention relates to novel and useful transition metal complexes of azulene. An object of this invention is to provide a novel class of organometallic compounds. Another object is to provide a class of stable transition metal coordination compounds of azulene. A further object is to provide a novel class of stable non-ionic azulene metal complexes having unsymmetric configurations. Other objects will become apparent from the specification and claims which follow. The above objects are accomplished by providing nonionic complex compounds of the metals of groups IVB- VIII in which a metal atom or atoms are bonded to azulene, which compound is stabilized by additional covalent bonding of the metal atom or atoms to dissimilar electron-donating groups. The metal in the novel compounds of this invention is a metal of groups IVBVIII of the periodic table as shown in The Handbook of Chem ...
The general name metallocene is derived from ferrocene, (C5H5)2Fe or Cp2Fe , systematically named bis(η5-cyclopentadienyl)iron(II). According to the IUPAC definition, a metallocene contains a transition metal and two cyclopentadienyl ligands coordinated in a sandwich structure, i. e., the two cyclopentadienyl anions are co-planar with equal bond lengths and strengths. Using the nomenclature of hapticity, the equivalent bonding of all 5 carbon atoms of a cyclopentadienyl ring is denoted as η5, pronounced pentahapto. There are exceptions, such as uranocene, which has two cyclooctatetraene rings sandwiching a uranium atom.. In metallocene names, the prefix before the -ocene ending indicates what metallic element is between the Cp groups. For example in ferrocene, iron(II) or ferrous is present.. In contrast to the more strict definition proposed by IUPAC, which requires a d-block metal and a sandwich structure, the term metallocene and thus the denotation -ocene, is applied in the chemical ...
f-Block Metallocene refers to a class of organometallic sandwich compounds with f-Block metal and electron-rich ligands like cyclopentadienyl anion. The first prepared and well-characterized f-block metallocenes were the tris(cyclopentadienyl) lanthanide complexes, (C5H5)3Ln (Ln = La, Ce, Pr, Nd, Sm and Gd). However, their significance is limited more to their existences and structures than to their reactivity. The cyclopentadienyl ligands of f-block metallocenes were considered as inert ancillary ligands, only capable of enhancing their stability and solubility, but not their reactivity. In addition, only late and small metals in the lanthanide series, i.e., elements from Sm to Lu, are trivalent metallocene complexes, [(C5H5)2LnZ]n In 1980, the pentamethylcyclopentadienyl ligand, C5Me− 5, was introduced to prepare the lanthanide complexes with all metals in the series. Apart from improving the stability and solubility of the complexes, it was demonstrated to participate in organometallic ...
Alfa Aesar™ Bis(cyclopentadienyl)titanium dichloride, 97% 250g Alfa Aesar™ Bis(cyclopentadienyl)titanium dichloride, 97% Betaj to Bisc -Organics
A bulky, optically active monoanionic scorpionate ligand, tris(4S-isopropyl-5,5-dimethyl-2-oxazolinyl)phenylborate (To P*), is synthesized from the naturally occurring amino acid l-valine as its lithium salt, Li[To P*] (1). That compound is readily converted to the thallium complex Tl[To P*] (2) and to the acid derivative H[To P*] (3). Group 7 tricarbonyl complexes To P*M(CO) 3 (M = Mn (4), Re (5)) are synthesized by the reaction of MBr(CO) 5 and Li[To P*] and are crystallographically characterized. The ν CO bands in their infrared spectra indicate that π back-donation in the rhenium compounds is greater with To P* than with non-methylated tris(4S-isopropyl-2-oxazolinyl)phenylborate (To P). The reaction of H[To P*] and ZnEt 2 gives To P*ZnEt (6), while To P*ZnCl (7) is synthesized from Li[To P*] and ZnCl 2. The reaction of To P*ZnCl and KOtBu followed by addition of PhSiH 3 provides the zinc hydride complex To P*ZnH (8). In this study, compound 8 is the first example of a crystallographically ...
In the complex salt [eta superscript 6]-1-chloro-2-(pyrrolidin-1-yl)benzene]-([eta superscript 5]-cyclopentadienyl)iron(II) hexafluoridophosphate, [Fe(C[subscript 5]H[subscript 5])-(C[subscript 10]H[subscript 12]CIN)]PF[subscript 6], (I), the complexed cyclopentadienyl and benzene rings are almost parallel, with a dihedral angle between their planes of 2.3 (3)°. In a related complex salt, ([eta superscript 5]-cyclopentadienyl){2-[[eta superscript 6]-2-(pyrrolidin-1-yl)phenyl]phenol}-iron(II) hexafluoridophosphate, [Fe(C[subscript 5]H[subscript 5])(C[subscript 16]H[subscript 17]NO)]PF[subscript 6], (II), the analogous angle is 5.4 (1)°. In both complexes, the aromatic C atom bound to the pyrrolidine N atom is located out of the plane defined by the remaining five ring C atoms. The dihedral angles between the plane of these five ring atoms and a plane defined by the N-bound aromatic C atom and two neighboring C atoms are 9.7 (8) and 5.6 (2)° for (I) and (II), respectively ...
Organometallic compounds composed of metal atoms and organic molecular rings have unique physical and chemical properties, and show attractive applications in optoelectronic devices, catalysts, biosensors and so on. In this paper, the structure and photoelectron spectra of a series of organometallic compounds Ln(C|sub|8|/sub|H|sub|8|/sub|)|sub|2|/sub||sup|¯|/sup| (Ln = Ce, Eu, Ho, Nd and Yb) have been systematically studied by using two functional B3LYP and BPW91 based on the density functional theory. The results show organometallic complexes Ln(C|sub|8|/sub|H|sub|8|/sub|)|sub|2|/sub||sup|¯|/sup| are typical sandwich structure. Both Eu(C|sub|8|/sub|H|sub|8|/sub|)|sub|2|/sub||sup|¯|/sup| and Ho(C|sub|8|/sub|H|sub|8|/sub|)|sub|2|/sub||sup|¯|/sup| have perfect sandwich structure with high D8h point symmetry. Nd(C|sub|8|/sub|H|sub|8|/sub|)|sub|2|/sub||sup|¯|/sup| and Yb(C|sub|8|/sub|H|sub|8|/sub|)|sub|2|/sub||sup|¯|/sup| possess D|sub|4h|/sub| point symmetry. Ce(C|sub|8|/sub|H|sub|8|/sub|)|sub|2|
The acquisition, analysis, and understanding of metal-ligand bond energy information in organometallic molecules is an active and important area of chemical research. This new volume presents a broad, up-to-date, and in-depth overview of the current state of knowledge in this field. It brings together carefully reviewed contributions from leading experimental researchers studying organometallic bonding energetics in the gas phase, in solution, and on well-characterized surfaces. The latest theoretical developments are also presented. In addition, an overview chapter provides an introduction to basic concepts and the various experimental methodologies employed, as well as an extensive bibliography of relevant review articles, textbooks, thermodynamic data compilations, and other source materials.Marks, Tobin J. is the author of Bonding Energetics in Organometallic Compounds with ISBN 9780841217911 and ISBN 0841217912. [read more] ...
Several cobalt complexes with tripodal chelating ligands Tp and Tp* (Tp = tris(pyrazolyl)borate; Tp* = tris(3,5-dimethyl-pyrazolyl)borate) were synthesized by treating the homoscorpionates of the first generation with CoBr2 under different conditions. These complexes were characterized with X-ray crystallographic determination as well as IR, NMR, MS, and UV-vis spectroscopies. Reaction of KTp with CoBr2 in THF afforded an unprecedented trinuclear Co(II) complex [TpCo(Hpz)Br]2(CoBr2) (1) with Tp as terminal ligands, as well as an oxidized side-product (Tp2Co)(Co2Br6) (2). The terminal Co(II) centers of (1) are octahedrally coordinated while the Co(II) in the bridging unit has a distorted tetrahedral geometry, holding a neighboring Co···Co distance of 3.472 Å. Reaction of KTp* with CoBr2 afforded half-sandwich Tp*CoBr (4) with pseudotetrahedrally coordinated Co(II) center, which is accessible to other donors. Mononuclear Tp*CoSPh (7) and dinuclear (Tp*Co)2O2(pz)2 (8) were prepared through ...
A carbon ignition temperature depressing agent is disclosed along with a method of regenerating an automotive particulate trap using the ignition temperature depressing agent. The agent is effective to promote oxidation of on-board collected carbonaceous particles extracted from the automobile exhaust. The agent comprises (a) an organometallic compound that upon heating (the combustion process of the engine) forms a readily reducible metal oxide which when finely divided promotes a carbonaceous ignition temperature in the range of as low as 450 F. and up to as low as 675 F., and (b) an aerosol-promoting liquid carrier effective to form a fine mist with the organometallic compound when sprayed, the carrier having a boiling point in the range of 176 -302 F. (80 -150 C.). The organometallic compound is one or more metal octoates having the metal selected from the group consisting of copper, nickel and cerium. The organometallic compounds are readily soluble and stable in the fuel supply used with an
Organometallic chemistry, rigorously defined by the chemical synthesis and reactivity of molecules with metal-carbon bonds, is a vibrant area of research with a large variety of practical applications [1]. For example, organometallic complexes are commonly used as catalysts for the production of commodity chemicals, materials such as polymers, and in fine chemical synthesis and medicinal chemistry discovery [1,2]. The majority of discoveries in the area have been performed in the solution phase, with studies in the solid state generally often reserved only for structural analysis; for example, single-crystal X-ray crystallography and, to a significantly lesser extent, solid-state nuclear magnetic resonance spectroscopy. By contrast to the solution phase, studies on the synthesis of, and catalysis using, organometallic complexes in the solid phase have attracted significantly less attention, even though there are potential benefits to this approach, such as: improved selectivities in synthesis ...
Applied Homogeneous Catalysis with Organometallic Compounds | Boy Cornils, Wolfgang A. Herrmann | download | B-OK. Download books for free. Find books
Accelerators that can be useful for an energy polymerizable composition comprising a cationically curable material; energy polymerizable compositions comprising at least one cationically curable material and an initiation system therefor, the initiation system comprising at least one organometallic complex salt and at least one accelerator; and a method for curing the compositions. The cured compositions can provide useful articles. The invention also provides compositions of matter comprising an organometallic complex salt and at least one compound selected from the Class 1 through Class 4 compounds disclosed herein.
The three organometallic complexes [(Cis-Pt^II (DDH) (2,5- Dihidroxibenzensulfonic)^2, Rh^I (CO)2 Cl(2- Aminobenzothiazole) and Rh^I (CO)2 Cl(5-Cl-2- Methilbenzothiazole)] used in this study had been previously found to have a high in vitro activity against promastigote and amastigote like forms of Leishmania donovani. Here, the cytotoxic effect of these new organometallic complexes on the J-774 macrophages were studied. Only the Rh^I(CO)2 Cl (2-Aminobenzothiazole) complex induced substantial toxicity in the cells.. Also, we assayed the effect of this complex on the parasite s biosynthesis of macromolecules. The Rh^I(CO)2Cl (5-Cl-2- Methylbenzothiazole) complex inhibited DNA, RNA, and protein synthesis. On the other hand, the two other compounds tested did not inhibit the incorporation of radioactive precursors. Finally important ultrastructural alterations in the parasites treated with the two non-cytotoxic complexes were observed ...
16. R.W. Schurko, Simon Fraser University, January 25, 2006. Observing the Invisible Nucleus: NMR of unreceptive nuclei in inorganic, organometallic and other solid materials.. 15. R.W. Schurko. National Research Council, Ottawa. October 20, 2005. NMR of unreceptive nuclei in solid materials: developments and applications.. 14. R.W. Schurko. University of Western Ontario, October 5, 2005. Solid-state NMR across the periodic table: Applications to organometallic and inorganic materials.. 13. R.W. Schurko. University of Ottawa, September 16, 2005. Solid-State NMR across the periodic table: Applications to organometallic and inorganic materials.. 12. R.W. Schurko. Michigan State University, Sept. 27, 2004. Solid-State NMR of Quadrupolar Nuclei in Organometallic Complexes, Mesoporous Composite Materials & Nanoparticles, a talk by R.W. Schurko.. 11. R.W. Schurko. University of Manitoba, Sept. 17, 2004. Solid-State NMR of Quadrupolar Nuclei in Organometallic Complexes, Mesoporous Composite Materials & ...
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Nickelocene is the organonickel compound with the formula Ni(η5-C5H5)2. Also known as bis(cyclopentadienyl)nickel or NiCp2, this bright green paramagnetic solid is of enduring academic interest, although it does not yet have any known practical applications. Ni(C5H5)2 belongs to a group of organometallic compounds called metallocenes. Metallocenes usually adopt structures in which a metal ion is sandwiched between two parallel cyclopentadienyl (Cp) rings. In the solid-state, the molecule has D5h symmetry, wherein the two rings are eclipsed. The Ni center has a formal +2 charge, and the Cp rings are usually assigned as cyclopentadienyl anions (Cp−), related to cyclopentadiene by deprotonation. The structure is similar to ferrocene. In terms of its electronic structure, three pairs of d electrons on nickel are allocated to the three d orbitals involved in Ni-Cp bonding: dxy, dx2-y2, dz2. One of the two remaining d-electrons resides in each of the dyz and dxz orbitals, giving rise to the ...
Any two L and/or A ligands may be bridged to each other. The metallocene compound may be full-sandwich compounds having two or more ligands L, which may be cyclopentadienyl ligands, cyclopentadiene derived ligands or substituted cyclopentadienyl ligands, or half-sandwich compounds having one ligand L, which is a cyclopentadienyl ligand or heteroatom substituted cyclopentadienyl ligand or hydrocarbyl substituted cyclopentadienyl ligand such as an indenyl ligand, a benzindenyl ligand or a fluorenyl ligand and the like or any other ligand capable of T, bonding to a transition metal atom (M). One or more of these bulky ligands is K -bonded to the transition metal atom. Each L can be substituted with a combination of substituents, which can be the same or different including hydrogen or a linear, branched or cyclic alkyl, alkenyl or aryl radicals for example. The metal atom (M) may be a Group 4, 5 or 6 transition metal or a metal from the lanthanide and actinide series, preferably the transition ...
United States Patent Ofi 3,103,525 Patented Sept. 10, 1963- PROCESS FOR HYDROGENATING IRON SUB- GROUP METAL CYCLOPENTADENYL COM- POUNDS Thomas H. Coflield, Heidelberg, Germany, and Kryn G. lhrman, Farmington, Mich, assignors to Ethyl Corporation, New York, N.Y., a corporation of Virginia N Drawing. Filed Sept. 18, 1959, Ser. No. 840,79 11 Claims. (Cl. 260-429) This invention relates to a chemical process for preparing organometallic compounds. More specifically, this invention relates to a process for forming organometallic compounds in which an aromatic-metal-cyclopentadienyl compound is reduced to form a compound in which both an aromatic molecule and a cyclopentadiene molecule are bonded to the metal atom. An object of this invention is to provide a process for forming organometallic compounds. A furtherobject is to provide a new process in which an aromaticmetalscyclopentadienyl compound, either neutral orionic, is reacted with reducing agent to form compounds (in which both an aromatic ...
The past 15 years have witnessed tremendous advances in the design and use of organometallic complexes as precatalysts for olefin polymerization. Most recently, an intense search has been started in next-generation single-site catalysts. New approaches have been taken to ligand design.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam ...
The main target of this thesis is the design of a new aluminum-based surface ligand with low coordination and expected high acidity. These new supports will serve for the immobilization of different organometallic complexes with the surface organometallic chemistry (SOMC). The resulting molecular like species will be used for various catalytic applications including alkane metathesis, olefin metathesis and polymerization. The first chapter is an introduction to the field of catalysis, more specifically, surface organometallic with a summary of its concept and the main examples cited for the immobilization of transition metal complexes on different oxide surfaces (silica, silica-alumina and alumina). This chapter presents, as well, an overview of the use of the aluminum alkyls compounds and their immobilization on a surface for the generation of various aluminum based surfaces. The Second chapter details the reaction involving the grafting of the monomeric triisobutylaluminum on SBA-15700. The ...
Quantum chemistry calculations showed that the first reduction, as experimentally observed by cyclic voltammetry for a series of neutral and cationic functionalised bis(cyclopentadienyl) titanium(iv) derivatives, is metal based, involving the chemically and electrochemically reversible TiIV/TiIII redox couple. The
McLennan, Alistair J. (1983) Cyclopentadienyl platinum complexes and organic group transfer reactions. PhD thesis, University of Glasgow. Full text available as ...
Novel 3-O-1,2;5,6-di-O-isopropylidene-alpha-D-glueofuranose] and 3-O-D-glucose] derivatives with an iminodiacetate (N,O,O), a histidinate, and an N-(acetetyl)picolylamine (N,N,O) chelating system for tridentate coordination of the organometallic M(CO)(3)-fragment (M = Tc, Re) have been prepared. The chelates were introduced and assembled through reductive amination starting from 3-O-1,2;5,6-di-O-isopropylidene-alpha-D-glucofuranose]-acetaldehyde. After deprotection, the pyranose derivatives were reacted with the precursor NEt4](2)ReBr3(CO)(3)] to afford the corresponding organometallic complexes in yields between 54% and 94%. The NMR, MS, and IR analyses corroborated the tridentate coordination of the organometallic metal center exclusively via the synthetic chelates. In the case of the N-(acetyl)picolylamine derivative, the coordinative properties were further confirmed by X-ray structure analysis of the first Re(CO)(3)-D-glucofuranose complex. All glucose complexes unveiled good stability and ...
COMMUNICATIONS A. K. Beck. D.A. Plattner, F. N. M. Kuhnle, J. Org. Chem. 1995,60,17881799. [8] D.Seebach. D.A. Plattner, A.K. Beck, Y. M. Yang, D. Hunziker, Hefv. Chim. Acta 1992.75,2171-2209. [9]Review: K. Mikami in Encyclopedia of Reagents for Organic Synthesis, Vol. I (Ed.: L. A. Paquette), Wiley, Chichester, UK, 1995,p. 407;C. A. Martin, Ph. D. Thesis Massachusetts Institute of Technology, Cambridge, MA, USA. 1988:J. T. Wang, X. Fan, X. Feng, Y. M. Qian, Synthesis 1989,291292: G.E. Keck, K. H. Tarbet, L. S. Geraci, J. Am. Chem. Soc. 1993,115, 8467-8468: K. Mikami. S. Matsukawa, Tetrahedron: Asymmetry 1995, 6, 2571 -2574:J. W. Faller, D. W. Sams, X. Liu. J. Am. Chem. Soc. 1996,118, 1217-1218: S. Weigand, R. Brtickner, Chenr. EUKJ. 1996, 2,1077-1084. [lo] K. Mikami, S. Matsukawa. Nature 1997,385,613-615; M. Mori, H. Imma, N. Takai, Tetrahedron Letr.1997, 38, 6229-6232. [ll] See Ref. [lot and for a similar (R)-3,3,5,S-tetrachloro-4.4,6,6-tetramethylbiphenol, see: E. J. Corey, M. A. Letavic. M. ...
Chemische Bezeichnung oder Material: 3-Methoxyphenylmagnesium bromide Anmerkung zur Bezeichnung: 1M solution in THF/toluene CAS.: 36282-40-3 CAS Min. %.: 19.02 CAS Max. %.: 23.25 CAS_: 109-99-9 CAS Min. %_: 76.75 CAS Max. %_: 80.98 CAS: 108-88-3 Summenformel: C7H7BrMgO Strukturformel: CH3OC6H4MgBr Molare Masse: 211.34 MDL-Nummer: MFCD00672002 800ML 3-Methoxyphenylmagnesiumbromid, 1M Lösung in THF/Toluol, AcroSeal ...
Chemical Entities of Biological Interest (ChEBI) is a freely available dictionary of molecular entities focused on small chemical compounds.
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This thesis sets out to explore the electronic structures and redox properties of organometallic complexes. The mixed valence states of these complexes have been investigated and classified. Chapter 1 introduces the general area and provides a brief summary of the theory to electron transfer. The concepts discussed in Chapter 1 are developed further in subsequent Chapters. A trimetallic molecular assembly featuring two redox-active organoiron fragments connected via a central ruthenium tetramesitylporphyrin socket through pendant pyridyl moieties was investigated using electrochemical and UV-vis-NIR/IR spectroelectrochemical studies. Electrochemical studies reveal three reversible oxidation waves, the first two of which can be attributed to the stepwise oxidation of the iron centres. The redox separation between these iron redox waves was found to be constant regardless of electrolyte composition, suggesting a through bond mechanism for electronic interactions between the iron centres. An ...
The use of transition organometallic complexes as reagents for the synthesis of complex organic molecules has been under intensive growth and development for several decades, and many organic transformations of profound synthetic potential has been achieved. Particularly, the use of organoiron complexes has been recognized as a powerful tool in the synthetic methodology due to their ability to react with nucleophiles and electrophiles in a stereoselective fashion. The use of NMO as a chemoselective, metal mediated oxidizing agent will be discussed.
Diametrically opposed Carbenes on an α-Cyclodextrin : synthesis, characterization of organometallic complexes and Suzuki-Miyaura coupling in ethanol and in water, Eur. J. Org. Chem. 2013, DOI : 10.1002/ejoc.201300268. ...
Special topics in catalysis such as adsorption, catalyst preparation, homogeneous catalysis, inorganic and organometallic complexes as catalysts, mechanism of catalytic reactions, oxidation catalysis, will be studied as literature projects. The subjects of choice are based on the relevance for the ongoing research in the group. ...
Synthetic Stratagies to Optimize Photophysical and Photoredox Properties of Organometallic Complexes. **Friday, October 20, 2017 @ 3:00 PM in NSC 228 (refreshments 2:30 PM in NSC 306) ...
Buy The Pincer Ligand at Mighty Ape Australia. This book gives an account of the various facets of the development and use of organometallic complexes supported by the pincer group. Developed in th...
China Orgainc Pigment supplier, Phthalocyanine Blue, Phthalocyanine Green Manufacturers/ Suppliers - Jiangsu Mcolor Chemical Co., Ltd.
Static solid-state 35Cl (I = 3/2) NMR spectra of the organometallic compounds Cp2TiCl2, CpTiCl3, Cp2ZrCl2, Cp2HfCl2, Cp*2ZrCl2, CpZrCl3, Cp*ZrCl3, Cp2ZrMeCl, (Cp2ZrCl)2μ-O, and Cp2ZrHCl (Schwartzs reagent) have been acquired at 9.4 T with the quadrupolar Carr−Purcell Meiboom−Gill (QCPMG) sequence in a piecewise manner. Spectra of several samples have also been acquired at 21.1 T. The electric field gradient (EFG) tensor parameters, the quadrupolar coupling constant (CQ) and quadrupolar asymmetry parameter (ηQ), are readily extracted from analytical simulations of the spectra. The 35Cl EFG and chemical-shift tensor parameters are demonstrated to be sensitive probes of metallocene structure and allow for differentiation of monomeric and oligomeric structures. First-principles calculations of the 35Cl EFG parameters successfully reproduce the experimental values and trends. The origin of the observed values of CQ(35Cl) are further examined with natural localized molecular orbital (NLMO) ...
A redox-active metal-organic composite material shows improved and selective O-2 adsorption over N-2 with respect to individual components (MIL-101 and ferrocene). The O-2 sensitivity of the composite material arises due to the formation of maghemite nanoparticles with the pore of the metal-organic framework material. ...
(Polyene)Fe(CO)3 complexes (1) are shown to be stable to a two-step osmylation/periodate cleavage sequence to produce (dienal)Fe(CO)3complexes (2). In contrast, ozonolysis of 1 has been reported to lead to destruction of the complex. (Polyene)Fe(CO)3 complexes (1) are shown to be stable to a two step oxmylation-periodate cleavage sequence to produce (dienal)Fe(CO)3complexes (2). In contrast, ozonolysis of 1 has been reported to lead to destruction of the complexes 1.
TY - JOUR. T1 - Effects of treatment with a carbon monoxide-releasing molecule and a heme oxygenase 1 inducer in the antinociceptive effects of morphine in different models of acute and chronic pain in mice. AU - Hervera, Arnau. AU - Gou, Gemma. AU - Leánez, Sergi. AU - Pol, Olga. PY - 2013/8/1. Y1 - 2013/8/1. N2 - Rationale: Treatment with a carbon monoxide-releasing molecule (tricarbonyldichlororuthenium(II) dimer, CORM-2) or a classical heme oxygenase 1 inducer (cobalt protoporphyrin IX, CoPP) has potent anti-inflammatory effects, but the role played by these treatments in the antinociceptive effects of morphine during acute and chronic pain was not evaluated. Objectives: In wild type (WT), neuronal (NOS1-KO), or inducible (NOS2-KO) nitric oxide synthases knockout mice, we evaluated the effects of CORM-2 and CoPP treatments in the antinociceptive actions of morphine and their interaction with nitric oxide during acute, visceral, and chronic inflammatory or neuropathic pain. Methods: Acute ...
387501517 - EP 0983983 A3 2000-07-05 - Combinatorial synthesis and analysis of organometallic compounds and catalysts - [origin: EP0978499A2] Methodologies for the synthesis, screening and characterisation of organometallic compounds and catalysts (eg homogenous catalysts), including combinatorial synthesis, screening and characterisation of libraries of supported and unsupported organometallic compounds and catalysts (eg homogenous catalysts). The methods can be applied to the preparation and screening of large numbers of organometallic compounds which can be used not only as catalysts (eg homogeneous catalysts), but also as additives and therapeutic agents.[origin: EP0978499A2] Methodologies for the synthesis, screening and characterisation of organometallic compounds and catalysts (eg homogenous catalysts), including combinatorial synthesis, screening and characterisation of libraries of supported and unsupported organometallic compounds and catalysts (eg homogenous catalysts). The methods can be
Medicinal plants are increasingly being projected as suitable alternative source for the treatment of various diseases. However, toxic effects resulting from therapeutic bismuth compounds are still documented in animals and humans. This study described the genetic effects of five common lichen species and compared their activities on the genotoxicity induced by the colloidal bismuth subcitrate. After the application of colloidal bismuth subcitrate and lichen extracts, separate and together, human whole blood cultures were assessed by sister-chromatid exchange (SCE) and micronucleus tests. According to our results, the frequencies of SCE and micronucleus rate in peripheral lymphocytes were significantly increased by colloidal bismuth subcitrate (at dose 5 mu g/mL) compared with controls. However, lichen extracts had no genotoxic effect. The order of anti-genotoxicity efficacy against colloidal bismuth subcitrate was Pseudevernia furfuracea, Dermotocarpon intestiniforme, Ramalina capitata, ...
Reaction of Organic Halogen Compounds with Metals (Part Ⅰ) A Formation of Organometallic Complex in Dimethyl Formamide Solvent Reaction of organic chlorine containing ester, alcohol, and acids with metallic tin and zinc in dimethyl formamide solvent gave a good yield of organo metallic complex. The same reaction under a mixed U.V. irradiation could not give an appreciable yield of the complex except in the case of an elevated reaction temperature. The solvation effect of dimethyl formamide of the metallic complex formation was markedetly increased as compared to the reaction in toluene and cyclohexane. In case of chlorine containing carboxylic acid, the formation of organo chloro zinc complex of the salt was observed. The reaction of organo zinc complex with a carbonyl precursor gave the addition product together with a dimerized product. Especially the aldehyde species enhanced the formation of zinc complex. The addition reaction was simple and convenient, but the yield was not high.(30-40% for
CO and 4 of the CORMs (ALF 153, 157, 436 and CORM-2) increased cGMP levels in smooth muscle cells, while the rest of the compounds failed to alter cGMP production. The CORM-stimulated increase was minor (50-300% over basal) compared to the effects seen with the NO-donor, SNP (at least 100-fold). CORM-3, a widely used CORM, decreased basal cGMP levels in RASMC. Interestingly, CO and CORMs modestly reduced SNP-stimulated cGMP formation in RASMC. The inactive forms of CORMs (compounds lacking the ability to liberate CO) did not affect SNP-induced cGMP accumulation. CORMs also reduced bradykinin-stimulated cGMP levels in endothelial-smooth muscle co-cultures. In sGC activity assays using purified recombinant human sGC, CORMs were ineffective in stimulating cGMP production. However, CORMs blocked up to 80% of DEA-NO-induced sGC activity. ...
Zinc phthalocyanines (ZnPc) are currently being investigated in relation to their use as sensitisers for Photodynamic Therapy (PDT). In particular, the photophysical properties of these dyes are of interest since then- ability to generate the cytotoxic species, singlet oxygen ((^1)O(_2)), is believed to be central to their role in causing tumour necrosis. In this study, a detailed investigation of the photophysical properties of substituted zinc phthalocyanines under various conditions is described. Two novel β-tetra substituted zinc phthalocyanines have been synthesised, ZnPc(CMe(C0(_2)Me)(_2))(_4) and ZnPc(CHMeCO(_2)H)(_4). The nature of peripheral substituents has little effect on triplet state or singlet oxygen production by ZnPc, however, ZnPc(CHMeCO(_2)H)(_4) displays a remarkable sensitivity to the ionic strength of non aqueous solutions. Ion concentrations below 10(^-4) mol dm(^-3) induce dimerisation whilst concentrations greater than this promote monomerisation. This behaviour is ...
A metallocene catalyst is provided which comprises the product obtained by combining (a) a metallocene procatalyst, preferably one containing a bridging group possessing at least two bulky groups, and (b) a cation-generating cocatalyst. A process for activating a metallocene procatalyst is also provided which comprises combining the metallocene procatalyst with the components of a cation-generating cocatalyst.
TY - JOUR. T1 - Focal liver lesions. T2 - Evaluation of the efficacy of gadobenate dimeglumine in MR imaging - A multicenter phase III clinical study. AU - Petersein, Jan. AU - Spinazzi, Alberto. AU - Giovagnoni, Andrea. AU - Soyer, Philippe. AU - Terrier, Francois. AU - Lencioni, Riccardo. AU - Bartolozzi, Carlo. AU - Grazioli, Luigi. AU - Chiesa, Antonio. AU - Manfredi, Riccardo. AU - Marano, Pasquale. AU - Van Persijn Van Meerten, Els L.. AU - Bloem, Johannes L.. AU - Petre, Carina. AU - Marchal, Guy. AU - Greco, Alina. AU - McNamara, Michael T.. AU - Heuck, Andreas. AU - Reiser, Maximilian. AU - Laniado, Michael. AU - Claussen, Claus. AU - Daldrup, Heike E.. AU - Rummeny, Ernst. AU - Kirchin, Miles A.. AU - Pirovano, Gianpaolo. AU - Hamm, Bernd. PY - 2000/6. Y1 - 2000/6. N2 - PURPOSE: To evaluate gadobenate dimeglumine (Gd-BOPTA) for dynamic and delayed magnetic resonance (MR)imaging of focal liver lesions. MATERIALS AND METHODS: In 126 of 214 patients, MR imaging was performed before ...
Alfa Aesar™ Bis(cyclopentadienyl)vanadium bromide, 98% 1g; Ampoule Alfa Aesar™ Bis(cyclopentadienyl)vanadium bromide, 98% Betaj to Bisc -Organics
Table of Contents for 2016 Global and Chinese Cyclopentadienyl Manganese Tricarbonyl (CAS 12079-65-1) Industry Market Research Report by Prof Research Available at market-research-reports.com.
This invention uses a new method of producing ionic metallocene compounds. These compounds are useful as catalysts for polymerization of olefins, primarily propylene. This method uses an ionizing agent which ionizes the neutral metallocene compound. The ionizing ionic compound does not contain an active proton and contains a carbonium, oxonium or sulfonium cation. The anion of the ionizing ionic compound is not coordinated or is only loosely coordinated to the metallocene cation and is chemically unreactive with the metallocene cation. Examples of such compounds are triphenylcarbenium tetrakis(pentafluorophenyl)boronate, triphenylcarbenium tris(pentafluorophenyl)phenyl boronate and triphenylcarbeniumtris(pentafluorophenyl)4-trimethylsilyl-2,3,5,6-tetrafluorophenylboronate. The process of making catalysts with this invention produces catalysts having high activity and does not produce by-products which can inhibit catalyst activity. This new synthesis is a clean reaction which does not produce a Lewis
387498759 - EP 0976784 A4 2001-01-03 - METAL/RUBBER ADHESION PROMOTER AND RUBBER COMPOSITION - [origin: WO9942519A1] An adhesion promoter which is equal or superior in adhesiveness to an organocobalt compound and has improved storage stability; and a rubber composition containing the adhesion promoter. The adhesion promoter, which enhances adhesion between a steel cord and a rubber material, comprises an organometallic compound containing nickel and an organometallic compound containing zinc. The rubber composition comprises 100 parts by weight of a rubber ingredient and 0.1 to 10.0 parts by weight of the adhesion promoter.[origin: WO9942519A1] An adhesion promoter which is equal or superior in adhesiveness to an organocobalt compound and has improved storage stability; and a rubber composition containing the adhesion promoter. The adhesion promoter, which enhances adhesion between a steel cord and a rubber material, comprises an organometallic compound containing nickel and an organometallic compound
Emissive phosphorescent organometallic compounds are described that produce improved electroluminescence, particularly in the blue region of the visible spectrum. Organic light emitting devices employ
|i|Purpose|/i|. Retrospective comparison between gadofosveset trisodium and gadobenate dimeglumine steady state magnetic resonance angiography (SS-MRA) of the thoracic vasculature at 1.5T using signal-to-noise ratio (SNR) and vessel edge sharpness (ES) as markers of image quality. |i|Materials and Methods|/i|. IRB approval was obtained. Twenty separate patients each underwent SS-MRA using high-resolution 3D ECG-triggered coronal IR-TFE at 1.5T approximately 3-4 minutes following 10 or 15 mL gadofosveset or 20 mL gadobenate. ROIs were placed in the right atrium, left ventricle, left atrium, ascending aorta, descending aorta, and right pulmonary artery to estimate SNR. Vessel ES was estimated as 20-80% rise distances from line intensity profiles in the left pulmonary vein, ascending aorta, and descending aorta. Data were analyzed using nonpaired Students |svg xmlns:xlink=http://www.w3.org/1999/xlink xmlns=http://www.w3.org/2000/svg style=vertical-align:-0.11285pt;width:5.9250002px; id=M1 height=
Carbohydrate - metallocene conjugates. Metallocenes are organometallic compounds characterized by a transition metal central atom (M) bound to cyclopentadienide (Cp-/C5H5-) ligands, the general formula of metallocenes being Cp2M. Titanocene dichloride was among the first non-platinum organometallics investigated as promising anticancer agents. Although its clinical trials were stopped because of low efficacy and other drawbacks, the last two decades have witnessed renewed research interest in anticancer metallocenes. We have started a programme aimed at improving cytotoxic activity and pharmacological properties of metallocenes by their conjugation to carbohydrates, iminosugars and selected heterocycles. Carbohydrates and iminosugars have typicaly 3 - 6 functional groups that can be modified to ameliorate cytotoxic profile, bioavailability, solubility, biocompatibility, and hydrophobic/hydrophilic balance of the resulting metallocene-carbohydrate conjugate. Recently, we have extended this ...
This Thesis is dedicated to the synthesis and investigation of the rare-earth metal complexes with two particular types of chelating monoanionic ligand systems: • ortho-deprotonated N,N-dimethyl-benzylamines (dmba)- • cyclopentadienyl-phosphazenes (CpPN)- The first ligand system is presented by a series of side-chain modified (dmba)- ligands that have been used to study the influence of present or absent benzylic protons on the stability of homoleptic rare-earth metal tris-aryl complexes. Discussion of their synthesis, thermal stability and crystal structures composes Chapter II. The second and novel ligand system is presented by a series of CpPN-ligands with different substituents on P- and N-atoms and at the Cp-ring. A discussion of their syntheses, prototropic equilibria and molecular structures is presented in Chapter III. Cyclopentadienyl-phosphoranes are the intermediates in the CpPN ligand synthesis. Thus a new highly crowded cyclopentadienyl-phosphane skeleton, some mechanistic ...
This Thesis is dedicated to the synthesis and investigation of the rare-earth metal complexes with two particular types of chelating monoanionic ligand systems: • ortho-deprotonated N,N-dimethyl-benzylamines (dmba)- • cyclopentadienyl-phosphazenes (CpPN)- The first ligand system is presented by a series of side-chain modified (dmba)- ligands that have been used to study the influence of present or absent benzylic protons on the stability of homoleptic rare-earth metal tris-aryl complexes. Discussion of their synthesis, thermal stability and crystal structures composes Chapter II. The second and novel ligand system is presented by a series of CpPN-ligands with different substituents on P- and N-atoms and at the Cp-ring. A discussion of their syntheses, prototropic equilibria and molecular structures is presented in Chapter III. Cyclopentadienyl-phosphoranes are the intermediates in the CpPN ligand synthesis. Thus a new highly crowded cyclopentadienyl-phosphane skeleton, some mechanistic ...
0029]Aspects of the present disclosure relate to a process which comprises treating a Type I titanyl phthalocyanine with a weak acid having a pKa of at least equal to or greater than about -0.25, dissolving the weak acid treated Type I titanyl phthalocyanine in a solution comprising a trihaloacetic acid and an alkylene halide; adding the mixture comprising the dissolved Type I titanyl phthalocyanine to a solution comprising an alcohol and an alkylene halide thereby precipitating a Type Y titanyl phthalocyanine; treating the Type Y titanyl phthalocyanine with monohalobenzene thereby resulting in a high sensitivity titanyl phthalocyanine; a process wherein the weak acid pKa is from about 0 to about 15, and wherein the weak acid captures the metallic impurities present in the titanyl phthalocyanine Type I; a process where the weak acid pKa is from about 1 to about 10, and wherein the titanyl phthalocyanine obtained is Type V titanyl phthalocyanine; a process where the acid pKa is from about 2 to ...
We report the synthesis and analysis of metallocenes (ferrocene, chromocene, ruthenocene, vanadocene, tungstenocene-dihydride) encapsulated in single wall carbon nanotubes (SWNTs). In the case of ferrocene, efficient filling of the SWNTs was accomplished from both the liquid and the vapor phase. The other two metallocenes were filled from the vapor phase. High resolution transmission electron microscopy reveals single molecular chains of metallocenes inside SWNTs. Molecules move under the electron beam in the SWNTs indicating the absence of strong chemical bonds between each other and the SWNT wall. Their movement freezes after short illumination as a result of irradiation damage. Energy dispersive X-ray spectrometry confirms the presence of iron, chromium, ruthenium, vanadium and tungsten.
Extract] Significant recent attention has been devoted to the development of useful self-assembled hybrid materials.[1] This is particularly the case for metal-organic frameworks (MOFs), which display properties such as regularity, porosity, robustness, and high surface area that lead to potential applications in areas such as catalysis, gas separation, and storage.[2, 3] Our research groups and others have been developing new methods for the synthesis of both discrete and extended metal-organic materials, with particular interest in the controlled generation of increased structural complexity.[4] Herein we report a hierarchical self-assembly strategy which has been used to synthesize a new metal-organic framework. This strategy differs from the commonly employed molecular building block (MBB) and secondary building unit (SBU) approaches, where single metal ions or small inorganic clusters (polyhedra) are linked by bridging (often carboxylate) ligands in a one-pot reaction.[5] In these ...
|p|The development of two 1,8-napthalimide-conjugated Ru(|sc|ii|/sc|)-polypyridyl complexes which exhibit different DNA binding and photocleavage behavior is presented.|/p|
Gadoterate meglumine(Dotatrem) generic is a gadolinium based contrast agent, prescribed for visualization of brain along with with magnetic resonance imaging (MRI).
TY - JOUR. T1 - Interface-induced growth of boronate-based metal-organic framework membrane on porous carbon substrate for aqueous phase molecular recognition. AU - Liu, Schucheng. AU - Shinde, Sudhirkumar. AU - Pan, Jianming. AU - Ma, Yue. AU - Pan, Guoqing. PY - 2017/9/15. Y1 - 2017/9/15. N2 - For metal-organic frameworks (MOFs), introduction of special functional groups and integration on porous support will endow the MOF with specific molecular affinity and tunable membrane-like surface properties. Herein, we demonstrated a facile interface-induced Zn(II)-ligand-fragment co-assembly strategy to in situ fabricate boronate-based MOF membrane on hydrophobic porous carbon substrate for specific molecular recognition and separation. Due to the phenylboronic acid groups and hydrophobic porous carbon supporting layer, a catechol-containing medicinal natural flavone Luteolin was found to be efficiently and selectively recognized on the MOF composite in water-containing solution. As compared to the ...
Learn about the potential side effects of gadoterate meglumine. Includes common and rare side effects information for consumers and healthcare professionals.
Read the side effects of Gadoterate meglumine as described in the medical literature. In case of any doubt consult your doctor or pharmacist.
All 5 carbon atoms of a Cp ligand are bound to the metal in the vast majority of M-Cp complexes. This bonding mode is called η5-coordination. The M-Cp bonding arises from overlap of the five π molecular orbitals of the Cp ligand with the s, p, and d orbitals on the metal. This π bonding is significant, hence these complexes are referred to as π-complexes. Almost all of the transition metals, that is, group 4 to 10 metals, employ this coordination mode.[1]. In relatively rare cases, Cp binds to metals via only one carbon center. These types of interactions are described as σ-complexes because they only have a σ bond between the metal and the cyclopentadienyl group. Typical examples of this type of complex are group 14 metal complexes such as CpSiMe3. An example of both is (Cp2Fe(CO)2).. It is probable that η1-Cp complexes are intermediates in the formation of η5-Cp complexes. Still rarer, the Cp unit can bond to the metal via a three-carbons. In these η3-Cp complexes, the bonding ...
RESULTS: One hundred fourteen of 123 enrolled patients successfully underwent both examinations. Final diagnoses were intra-axial tumors, metastases, extra-axial tumors, other tumors, and nontumor (49, 46, 8, 7, and 4 subjects, respectively). Readers 1, 2, and 3 demonstrated preference for gadobenate dimeglumine in 46 (40.7%), 54 (47.4%), and 49 (43.0%) patients, respectively, compared with 6, 7, and 7 patients for gadobutrol (P , .0001, all readers). Highly significant (P , .0001, all readers) preference for gadobenate dimeglumine was demonstrated for all other qualitative end points. Inter-reader agreement was good for all evaluations (K = 0.414 - 0.629). Significantly superior CNR and LBR were determined for gadobenate dimeglumine (P , .019, all readers).. ...
These results indicate that pretreatment of rats with the synthetic catalytic scavenger of ROS, EUK-134, prevents oxidative stress and produces a significant degree of protection against the pathological manifestations of KA-induced seizure activity in hippocampus and piriform cortex. Although numerous studies have suggested that ROS are critically involved in excitotoxicity (see refs. 5, 30, and 31 for reviews), very few studies have demonstrated convincingly, in an in vivo excitotoxic model, a causal relationship between increased production of ROS and neuronal damage (7, 32). A clear demonstration of the crucial role of ROS in excitotoxicity should include: (i) evidence for increased production of ROS specifically in neuronal populations at risk with excitotoxicity before overt signs of neuronal damage and (ii) evidence that manipulations aimed at preventing ROS accumulation reduce neuronal damage without interfering with excitatory amino acid receptor functions. The former has been difficult ...
Detail záznamu - Synthesis and Electrochemistry of Cyclopentadienyl Ferratricarbollides Substituted by Me and Ph Groups on the Cage Carbon Atoms - Detail záznamu - Knihovna Akademie věd České republiky
In Co(C5H5)2 the Co centre is sandwiched between two cyclopentadienyl (Cp) rings. The Co-C bond lengths are about 2.1 Å, slightly longer than the Fe-C bond in ferrocene.[3]. Co(C5H5)2 belongs to a group of organometallic compounds called metallocenes or sandwich compounds.[4] Cobaltocene has 19 valence electrons, one more than usually found in organotransition metal complexes such as its very stable relative ferrocene. (See 18-electron rule.) This additional electron occupies an orbital that is antibonding with respect to the Co-C bonds. Consequently, the Co-C distances are slightly longer than the Fe-C bonds in ferrocene. Many chemical reactions of Co(C5H5)2 are characterized by its tendency to lose this extra electron, yielding an 18-electron cation known as cobaltocenium: ...
Over the past several years we have devised and expanded the capabilities of Zeeman atomic absorption spectroscopy (ZAA). Using this technique, trace elements in a complex matrix can be directly analyzed with high accuracy even when there is only one atom of interest contained in several million atoms of the host material. Quantities in the nanogram, or in some cases picogram, range can be determined within IS seconds for more than 30 elements. Because of its high selectivity and high sensitivity, ZAA can be used as a new technique for organometallic species determination by interfacing with a high pressure liquid chromatograph (HPLC). The HPLC separates various molecular species. Different kinds of mobil solvents can be directly introduced in the ZAA detection system; even organic solvents or high concentration salt solutions. Then, organometallic species in the ppb range are separately detected according to their retention times. This technique has a much larger field of application than HPLC coupled
The latter for most compounds. By fluxional I mean that some compounds interconvert between different shapes. Examples of these are the organometallic compounds such as bis(cyclopentadienyl)mercury (II) that exists both as the bis-monohapto and bis-pentahapto complexes. In the bis-monohapto complex the mercury is sigma bonded once to two carbon atoms... one on each of the two cyclopentadiene groups. In the bis-pentahapto complex, the mercury is bonded to every carbon in both cyclopentadienyl groups. Thats about as fluxional as you can get ...
The complexes CpMo(CO)3X (X = Cl, Br, I; Cp = C5H4CH3) and [CpMo(CO)3(L)]+ (L = CH3CN, CH3COCH3) were synthesized and their electrochemistry and electron transfer induced substitution reactions were studied. Electrochemical ...
The principal idea of this volume is to offer a Capita Selecta of unconventional and thought-provoking topics in organometallic chemistry, presented by experts in each field. As intended, this approach leads either to reviews covering a specific uncommon class of organometallic compounds or to overviews which relate uncommon physical properties with various classes of organometallic compounds. The contributions are streamlined thus onto two main axes - unusual properties reflecting structures and bonding situations, on the one hand, and uncommon structural features or structure-reactivity relationships, on the other. Extensive cross-referencing of useful information is provided, making this volume accessible for people working in rather different areas of organometallic chemistry ...
This publication or database and the information in it is protected by copyright. All reproductions of this copyrighted material must be for non-commercial educational fair use as defined by 17 U.S.C. 107.. ...
Development of organic methodologies.. Total synthesis of biological active products.. Organometallic complexes: design, synthesis and catalytic applications.. Greener chemistry.. Cancer research.. Synthesis and applications of porous materials such as MOFs and ZIFs.. Currently Funded Research Projects:. Project 1: Development of Adsorption-Based CO2 Separation System Using MOF Materials, Type: King Abdulaziz City for Science and Technology-Technology Innovation Center (KACST-TIC), Durations: Nov/13-Oct/15, Amount: SR 1,982,000. Role: Co-I. Project 2: N-Heterocyclic Carbene Complexes: Design, Synthesis and Catalytic Applications, Type: King Abdulaziz City for Science and Technology (KACST), Durations: Aug/13-Jul/15, Amount: SR 861,950. Role: P-I. Project 3: Dynamic Kinetic Resolution of Racemic Alcohols by Dual Enzymatic Method, Type: National Science, Technology and Innovation Plan (NSTIP), Duration: Mar/12-Feb/14, Amount: SR 1,996,800. Role: Co-I. Completed Funded Research ...
University of Sussex web profile of Dr Ian Crossley whose research expertise includes Alkynes, Chemical synthesis, Inorganic chemistry, Organometallic chemistry, Organometallic complexes of transition metals, and Phosphorus Chemistry
Development and applications of density-functional theory for study of electronic structure. Current applications include non-covalent interactions, molecular crystals, layered solids, electrides, and organometallic complexes.. ...
User: Alchemist-hp / Wikimedia Commons / CC-BY-SA-3.0 Research on catalysis combines the areas of homogeneous catalysis in the Institute of Technical Chemistry, heterogeneous catalysis in the Institute of Fuel Chemistry, and the catalytical properties of organometallic complexes, investigated primarily in the Institute of Inorganic Chemistry. ...
In this prospective referring-physician-based survey, we investigated the definite clinical impact of 68Ga-DOTATATE PET/CT on managing patients with neuroendocrine tumors (NETs). Methods: We prospectively studied 130 patients with 68Ga-DOTATATE PET/CT referred for initial or subsequent management decisions (NCT02174679). Referring physicians completed one questionnaire before the scan (Q1) to indicate the treatment plan without PET/CT information, one immediately after review of the imaging report to denote intended management changes (Q2), and one 6 mo later (Q3) to verify whether intended changes were in fact implemented. To further validate the Q3 responses, a systematic electronic chart review was conducted. Results: All 3 questionnaires were completed by referring physicians for 96 of 130 patients (74%). 68Ga-DOTATATE PET/CT resulted in intended management changes (Q2) in 48 of 96 patients (50%). These changes were finally implemented (Q3) in 36 of 48 patients (75%). Q3 responses were ...
... organometallic compounds; unsaturated hydrocarbons; polyaromatic hydrocarbons; additive remains; products of oil decomposition ...
Organometallic compounds. Quantitative chemical analysis is a key part of environmental chemistry, since it provides the data ... Organic compounds are commonly measured also using mass spectrometric methods, such as Gas chromatography-mass spectrometry (GC ... Organometallics in Environment and Toxicology. Metal Ions in Life Sciences. 7. Cambridge: RSC publishing. ISBN 978-1-84755-177- ... More sophisticated approaches are used in the determination of trace metals and organic compounds. Metals are commonly measured ...
"Polyfluoroaryl organometallic compounds. Part VIII. Synthesis of and nucleophilic substitution in octafluorodibenzofuran". J. ... and conversion of nitroso compounds to nitro compounds or nitramines. For example, a mixture of hydrogen peroxide and ... The hypervalent compound is accessible in two ways, and which is chosen usually depends on what materials are available: it can ... In the case of an allyl alcohol compound with a proximate carbonyl functional group, the epoxide can undergo a ring-expansion ...
D. Sutton (1993). "Organometallic diazo compounds". Chem. Rev. 93 (3): 995-1022. doi:10.1021/cr00019a008. Huttner, Gottfried; ... The need for additional nomenclature for organometallic compounds became apparent in the mid-1950s when Dunitz, Orgel, and Rich ... "IR-9.2.4.1 Coordination Compounds: Describing the Constitution of Coordination Compounds: Specifying donor atoms: General" (PDF ... The η-notation is encountered in many co-ordination compounds: Side-on bonding of molecules containing σ-bonds like H2: W(CO)3( ...
Coordination compounds. Due to its electronic structure, iron has a very large coordination and organometallic chemistry. ... Organoiron chemistry is the study of organometallic compounds of iron, where carbon atoms are covalently bound to the metal ... Iron forms compounds in a wide range of oxidation states, −2 to +7. Iron also forms many coordination compounds; some of them, ... Iron compounds. Although the dominant use of iron is in metallurgy, iron compounds are also pervasive in industry. Iron ...
Crompton, T. R. (6 December 2012). Gas Chromatography of Organometallic Compounds. Springer. pp. 80-83. ISBN 9781468442267. ... 23 (Metal-Organic Compounds): 92. doi:10.1021/ba-1959-0023.ch010. ISBN 0-8412-0024-6. Retrieved 17 August 2015. Barton, ... Advances in Organometallic Chemistry. New York, London: Academic Press. p. 284. ISBN 9780080580043. Retrieved 19 August 2015. ... doi:10.1016/s0040-4039(00)96380-9. Bell, R. P.; Emeléus, H. J. (1948). "The boron hydrides and related compounds". Quarterly ...
Dictionary of Organometallic Compounds. p. 468. Baker, Charles J. (2001). The Fire Fighter's Handbook of Hazardous Materials. ... Advances in Organometallic Chemistry. New York, London: Academic Press. p. 284. Retrieved 19 August 2015. Lehmann, Walter J.; ... 1,1-Dimethyldiborane is the organoboron compound with the formula (CH3)2B(μ-H)2BH2. A pair of related 1,2-dimethyldiboranes are ... Bell, R. P.; Emeléus, H. J. (1948). "The boron hydrides and related compounds". Quarterly Reviews, Chemical Society. 2 (2): 132 ...
Behr, Arno (2000). "Organometallic Compounds and Homogeneous Catalysis". Ullmann's Encyclopedia of Industrial Chemistry: pg. 10 ... Allyl iodide (3-iodopropene) is an organic halide used in synthesis of other organic compounds such as N-alkyl 2-pyrrolidones, ... Schorlemmer, C. (1874). A manual of the chemistry of the carbon compounds. London: Macmillan and Co. p. 262. Datta, Rasek Lal ( ... sorbic acid esters, 5,5-disubstituted barbituric acids, and organometallic catalysts. Allyl iodide can be synthesized from ...
doi: 10.1021/ja045602n Roy, Jackson W; Thomson, RJ; MacKay.m.f, . (1985). "The Stereochemistry of Organometallic Compounds. XXV ... Chlorodiphenylphosphine is an organophosphorus compound with the formula (C6H5)2PCl, abbreviated Ph2PCl. It is a colourless ... ISBN 0-471-31824-8 Svara, J.; Weferling, N.; Hofmann, T. "Phosphorus Compounds, Organic," In 'Ullmann's Encyclopedia of ... 2 PhPCl2 → Ph2PCl + PCl3 Alternatively such compounds are prepared by redistribution reactions starting with triphenylphosphine ...
Behr, Arno (2000). "Organometallic Compounds and Homogeneous Catalysis". Ullmann's Encyclopedia of Industrial Chemistry. p. 10 ... The compound exists as endo and exo isomers, but these are not typically separated. It is an intermediate in the production of ... Vinyl norbornene (VNB) is an organic compound that consists of an vinyl group attached to norbornene. It is a colorless liquid ...
Behr, Arno (2000). "Organometallic Compounds and Homogeneous Catalysis". Ullmann's Encyclopedia of Industrial Chemistry. doi: ... to form various N-heterocyclic compounds via the aza-Diels-Alder reaction. Nitroso compounds (R-N=O) can react with dienes to ... Ashby, E. C.; Chao, L.-C.; Neumann, H. M. (1973). "Organometallic reaction mechanisms. XII. Mechanism of methylmagnesium ...
Behr, Arno (2000). "Organometallic Compounds and Homogeneous Catalysis". Ullmann's Encyclopedia of Industrial Chemistry. p. 10 ... The compound consists of E- and Z-stereoisomers, but the mixtures are not separated. It is prepared by isomerization of vinyl ... Ethylidene norbornene (ENB) is an organic compound that consists of an ethylene group attached to norbornene. It is a colorless ...
These naturally occurring organometallic compounds. This area is more focused on the utilization of metals by unicellular ... The organic compounds (proteins, lipids and carbohydrates) contain the majority of the carbon and nitrogen and most of the ... Bioorganometallic compounds are significant in environmental chemistry. A number of drugs contain metals. This theme relies on ... 2010). Organometallics in Environment and Toxicology. Metal Ions in Life Sciences. 7. Cambridge: RSC publishing. ISBN 978-1- ...
talk , contribs)‎ (→‎Organometallic compounds: fixed error that C6Me6 found to be 'hexavalent'. added more info regarding ... talk , contribs)‎ (→‎Organothorium compounds: link Chemical Science (journal)). *(diff , hist) . . Thorium‎; 05:41 . . (+133)‎ ...
Abstract Relative Reactivities of Organometallic Compounds. XX.* Metalation Henry Gilman, Robert L. Bebb J. Am. Chem. Soc.; ... New methodology for the preparation of ortho-substituted thiophenols and related compounds Garret D. Figuly, Cynthia K. Loop, J ... sodium salt of TMP and di-tert-butylzinc is a meta zincated complex as a stable crystalline compound. This complex reacts with ... DOM has also been used with thiophenols to prepare compounds that are useful as hindered ligands. Directed metallation is not ...
Cox, J. D.; Pilcher, G. (1970). "Thermochemistry of Organic and Organometallic Compounds". New York: Academic Press: 1-636. ... So fluorine is the best leaving group for the substitution with organolithium compounds. The nucleophilic attack compounds may ... Some chemical compounds, although not synthesized from pyridine, contain its ring structure. They include B vitamins niacin and ... These bond lengths lie between the values for the single and double bonds and are typical of aromatic compounds. All the ring ...
Reactions with some oxides and organometallic compounds". J. Chem. Soc.: 2731-2734. doi:10.1039/JR9640002731. Vernon H. Dibeler ...
Aylett, B. J. (2012). Organometallic Compounds: Volume One The Main Group Elements Part Two Groups IV and V. Springer Science ... Greenwood, N. N. (1974). Spectroscopic Properties of Inorganic and Organometallic Compounds. Royal Society of Chemistry. p. 294 ... and Related Compounds". Organometallics. 17 (24): 5287-5293. doi:10.1021/om980520r. Cahours, A. (1862). "Untersuchungen über ... 7: Compounds of Groups 13 and 2 (Al, Ga, In, Tl, Be...Ba). Georg Thieme Verlag. 2014. p. 258. ISBN 9783131779618. ...
Spectroscopic Properties of Inorganic and Organometallic Compounds. Royal Society of Chemistry. p. 196. ISBN 9780851860237. " ... In this way, the compound is best described as a polymer, consisting of a double stranded chain. In the gas phase above 320 °C ... Niobium oxychloride is the inorganic compound with the formula NbOCl3. It is a white, crystalline, diamagnetic solid. It is ...
... is an organometallic compound of lead. It is a member of the class of metallocenes. It is soluble in benzene, ... Structure of and Bonding in [{nPr2P(BH3)}(Me3Si)C(CH2)]2Pb". Organometallics. 27: 4386. doi:10.1021/om800598b. Jutzi, Peter; ...
0.5 millisecond half-life) Many organometallic compounds exhibit fluxionality. The compound Fe(η5-C5H5) (η1- C5H5)(CO)2 ... "Stereochemically Nonrigid Organometallic Compounds. I. π-Cyclopentadienyliron Dicarbonyl σ-Cyclopentadiene". J. Am. Chem. Soc. ... At temperatures near 100 °C, the 500 MHz NMR spectrum of this compound shows only one signal for the methyl groups. Near room ... Because virtually all molecules are fluxional in some respects, e.g. bond rotations in most organic compounds, the term ...
doi:10.1016/S0040-4039(01)93098-9. Craig, P. J. (2003). Organometallic Compounds in the Environment (2nd ed.). Chichester: John ... Arsenobetaine is an organoarsenic compound that is the main source of arsenic found in fish. It is the arsenic analog of ... It has been known since 1920 that marine fish contain organoarsenic compounds, but it was not until 1977 that the chemical ... Arsenobetaine is a common substance in marine biological systems and unlike many other organoarsenic compounds, such as ...
"Organometallic Compounds of Groups 2 and 12". Organometallics (3rd ed.). John Wiley & Sons. pp. 59-85. ISBN 9783527805143. ... The compound itself was first synthesized in 1962 as a tert-butyl derivative and then as the unsubstituted compound by Eugene ... it can be used as a starting material for synthesising some pentamethylcyclopentadienyl organometallic compounds including [Cp* ... The compound is named after James Dewar who included this structure in a list of possible C6H6 structures in 1867. However, he ...
"Organometallic Compounds of Groups 2 and 12". Organometallics (3rd ed.). John Wiley & Sons. pp. 59-85. ISBN 9783527805143. ... Kotz, John C. (1986). "The Electrochemistry of Transition Metal Organometallic Compounds". In Fry, Albert J.; Britton, Wayne E ... Hexamethylbenzene can be used as a ligand in organometallic compounds. An example from organoruthenium chemistry shows ... The compound can be prepared by reacting phenol with methanol at elevated temperatures over a suitable solid catalyst such as ...
free download) Davidson, G. (2000-01-01). Spectroscopic Properties of Inorganic and Organometallic Compounds. Royal Society of ... Very weak absorption at 12.19 μm shows a very small quantity of ionic nitrate exists, so this compound is mostly covalent. Dove ... Vanadyl nitrate, also called vanadium oxytrinitrate or vanadium oxynitrate is a compound of vanadium in the +5 oxidation state ... It can be used to nitrate various organic compounds at high yield when diluted with dichloromethane. Nitrotoluene, methyl ...
... s are organometallic compounds that contain carbon - lithium bonds. They are important reagents in organic ... doi:10.1016/S0040-4039(00)99279-7. Carey, Francis A. (2007). "Organometallic compounds of Group I and II metals". Advanced ... Organolithium reagents are often used to prepare other organometallic compounds via transmetalation. Organocopper, organotin, ... "The effects of added salts on the stereoselectivity and rate of organometallic compound addition to ketones". J. Org. Chem. 44 ...
Coordination complexes and organometallic compounds are also photoreactive. These reactions can entail cis-trans isomerization ... He observed that crystals of the compound α-santonin when exposed to sunlight turned yellow and burst. In a 2007 study the ... P. Klán, J. Wirz Photochemistry of Organic Compounds: From Concepts to Practice. Wiley, Chichester, 2009, ISBN 978-1405190886. ... doi:10.1002/14356007.a06_233.pub2 Balzani, Vincenzo; Carassiti, Vittorio (1970). Photochemistry of Coordination Compounds. New ...
"Solvent effects on the reactivities of organometallic compounds". Coord. Chem. Rev. 18 (2): 225. doi:10.1016/S0010-8545(00) ... Generally, polar solvents dissolve polar compounds best and non-polar solvents dissolve non-polar compounds best: "like ... The ability of one compound to be dissolved in another is known as solubility; if this occurs in all proportions, it is called ... This is opposed to the situation when the compounds are insoluble like sand in water. In a solution, all of the ingredients are ...
One of his new classes of compounds was "syndesmides", which were compounds formed by the combination of two or more simpler ... From Weinreb Amides using stoichiometric organometallic reagents.. *Aromatic ketones can be prepared in the Friedel-Crafts ... By the reaction of an acid chloride with organocadmium compounds or organocopper compounds. ... The most widely used member of this class of compounds is methyl vinyl ketone, CH3C(O)CH=CH2, which is useful in the Robinson ...
These compounds include vinblastine, vincristine, vindesine, and vinorelbine. Additional researched vinca alkaloids include ... A Departure from Preformed Organometallic Reagents. Topics in Current Chemistry. 279. Springer Science & Business Media. pp. 25 ...
Organometallic compounds of the higher alkali metals are even more reactive than organosodium compounds and of limited utility ... Unlike the organolithium compounds, the organometallic compounds of the heavier alkali metals are predominantly ionic. The ... Being the smallest alkali metal, lithium forms the widest variety of and most stable organometallic compounds, which are bonded ... Compounds with the group 13 elementsEdit. The intermetallic compounds of the alkali metals with the heavier group 13 elements ( ...
C6F5)3B was used to prepare a compound containing a Xe-C bond: (C6F5)3B + XeF2 → [C6F5Xe]+[(C6F5)2BF2]−. Upon reaction with ... Organometallics. 20 (23): 4927-4938. doi:10.1021/om010610n.. ... Related fluoro-substituted boron compounds, such as those ... Otherwise (C6F5)3B binds to a wide range of Lewis bases, even weak ones.[8] The compound is hygroscopic, forming the trihydrate ... Tris(pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C6F5)3B. It is a white, volatile solid ...
Although most compounds are referred to by their IUPAC systematic names (following IUPAC nomenclature), "traditional" names ... Inorganic Molecules made thinkable, an interactive visualisation showing inorganic compounds for an array of common metal and ... Retrieved from "https://en.wikipedia.org/w/index.php?title=List_of_inorganic_compounds&oldid=907095066" ...
... compound F. Compound F continues to react with the palladium intermediate B, with regeneration of the copper halide, G. ... they have found application to numerous areas of organometallic homogeneous catalysis. The most easily available are stable ... The active palladium catalyst is the 14 electron compound Pd0L2, complex A, which reacts with the aryl or vinyl halide in an ... In an inverse Sonogashira coupling the reactants are an aryl or vinyl compound and an alkynyl halide. While a copper co- ...
Examples include compounds based on the 1-Ethyl-3-methylimidazolium (EMIM) cation and include: EMIM:Cl, EMIM dicyanamide, (C. 2 ... H. L. Chum; V. R. Koch; L. L. Miller; R. A. Osteryoung (1975). "Electrochemical scrutiny of organometallic iron complexes and ... Saturated aliphatic compounds are generally only sparingly soluble in ionic liquids, whereas olefins show somewhat greater ... They offer the specificity required to separate similar compounds from each other, such as separating polymers in plastic waste ...
"Silanes" refers to many compounds with four substituents on silicon, including an organosilicon compound. Examples include ... M. A. Brook "Silicon in Organic, Organometallic, and Polymer Chemistry" 2000, J. Wiley, New York. ISBN 0-471-19658-4. ... They called the compound siliciuretted hydrogen.[8] For classroom demonstrations, silane can be produced by heating sand with ... Simmler, W. "Silicon Compounds, Inorganic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/ ...
Silyl esters - Removed by acid, base and organometallic reagents.. *Orthoesters - Removed by mild aqueous acid to form ester, ... As an alternative, Baran presented a novel protective-group free synthesis of the compound hapalindole U. The previously ... In many preparations of delicate organic compounds, some specific parts of their molecules cannot survive the required reagents ...
A compound is a pure chemical substance composed of more than one element. The properties of a compound bear little similarity ... organometallic chemistry, petrochemistry, pharmacology, photochemistry, physical organic chemistry, phytochemistry, polymer ... An organic compound is defined as any compound based on a carbon skeleton. ... in which a compound donates one or more electrons to another compound to produce ions (cations and anions); hydrogen bonds; and ...
Alcohols from Carbonyl Compounds: Oxidation-Reduction and Organometallic Compounds[permanent dead link] (PDF) ... Chromic acid is capable of oxidizing many kinds of organic compounds and many variations on this reagent have been developed: * ... Silver(I) compounds have been used for this purpose. Each oxidant offers advantages and disadvantages. Instead of using ... Hexavalent chromium compounds (including chromium trioxide, chromic acids, chromates, chlorochromates) are toxic and ...
Crabtree, Robert H. (2009). The Organometallic Chemistry of the Transition Metals (5th ed.). Wiley. pp. 99-100. ISBN 978-0-470- ... Coordination compounds. Hidden categories: *CS1 errors: missing periodical. *Pages with citations lacking titles ... Tolman, C. A. (1977). "Steric Effects of Phosphorus Ligands in Organometallic Chemistry and Homogeneous Catalysis". Chem. Rev. ... R. H. Crabtree (2005). "4. Carbonyls, Phosphine Complexes, and Ligand Substitution Reactions". The Organometallic Chemistry of ...
... comprises a diverse range of molecules and to some extent is a catchall for relatively water-insoluble or nonpolar compounds of ...
Organometallics. 2007, 26 (18): 4612. doi:10.1021/om700543p.. *^ Audi, G.; Bersillon, O.; Blachot, J.; Wapstra, A.H. The NUBASE ... Heiserman, David L. Exploring Chemical Elements and their Compounds. TAB Books. 1992: 272-274. ISBN 0-8306-3018-X.. ... Perry, D. L. Handbook of Inorganic Compounds. CRC Press. 1995: 296-298. ISBN 0-8493-8671-3.. ...
Many use organic materials, often organometallic compounds as well as inorganic substances. Despite the fact that their ... 3, PbS, etc.), instead of organic or organometallic dyes as light absorbers. Due to the toxicity associated with Cd and Pb ... achieved by selectively absorbing the ultraviolet and near-infrared parts of the spectrum with small-molecule compounds.[95][96 ... such as polyphenylene vinylene and small-molecule compounds like copper phthalocyanine (a blue or green organic pigment) and ...
"Organometallics". IHS Chemicals. February 2012.. *^ Yurkovetskii, A. V.; Kofman, V. L.; Makovetskii, K. L. (2005). " ... Clark, Jim (2005). "Some Compounds of the Group 1 Elements". chemguide.co.uk. Hentet 8. august 2013.. ... Stone, F. G. A.; West, Robert (1980). Advances in organometallic chemistry. Academic Press. s. 55. ISBN 0-12-031118-6.. ... Application of Lithium and its Compounds in Energetic Systems". Propellants, Explosives, Pyrotechnics 29 (2): 67-80. doi: ...
"for their pioneering work, performed independently, on the chemistry of the organometallic, so called sandwich compounds"[65] ... for] his services to organic chemistry and the chemical industry by his pioneer work in the field of alicyclic compounds"[10] ... for] the discovery of the elements radium and polonium, by the isolation of radium and the study of the nature and compounds of ... "for his work on biochemically important sulphur compounds, especially for the first synthesis of a polypeptide hormone"[47] ...
Organic compounds containing multiple nitrile groups are known as cyanocarbons. Inorganic compounds containing the −C≡N group ... In organometallic chemistry nitriles are known to add to alkynes in carbocyanation:[33] ... A nitrile is any organic compound that has a −C≡N functional group.[1] The prefix cyano- is used interchangeably with the term ... The first compound of the homolog row of nitriles, the nitrile of formic acid, hydrogen cyanide was first synthesized by C. W. ...
In aqueous solution, like compounds of other late lanthanides, soluble ytterbium compounds form complexes with nine water ... "Organometallics. 21 (8): 1707. doi:10.1021/om0109915.. *^ Gale, T.F. (1975). "The Embryotoxicity of Ytterbium Chloride in ... 2 oxidation state occurs only in solid compounds and reacts in some ways similarly to the alkaline earth metal compounds; for ... Marignac suspected that ytterbia was a compound of a new element that he called "ytterbium".[9][23][25][26][27] ...
"Exploring Chemical Elements and their Compounds. New York: TAB Books. pp. 150-152. ISBN 0-8306-3018-X. .. ... Humphry Davy thought in 1800 that silica was a compound, not an element, and in 1808 suggested the present name. In 1811 Louis- ...
This element forms a large number of organometallic compounds, such as tetraethylgermane, useful in organometallic chemistry. ... Germane (GeH4) is a compound similar in structure to methane. Polygermanes-compounds that are similar to alkanes-with formula ... Precautions for chemically reactive germanium compoundsEdit. Some of germanium's artificially-produced compounds are quite ... Additionally Ge2Cl6 and some higher compounds of formula GenCl2n+2 are known.[28] The unusual compound Ge6Cl16 has been ...
"for their pioneering work, performed independently, on the chemistry of the organometallic, so called sandwich compounds"[72] ... for] his services to organic chemistry and the chemical industry by his pioneer work in the field of alicyclic compounds"[17] ... for] the discovery of the elements radium and polonium, by the isolation of radium and the study of the nature and compounds of ... "for his work on biochemically important sulphur compounds, especially for the first synthesis of a polypeptide hormone"[54] ...
In addition to dealing with transport and sensing of oxygen, they may also deal with NO, CO2, sulfide compounds, and even O2 ... Vaska's complex - iridium organometallic complex notable for its ability to bind to O2 reversibly. ... Although the color of the planet is due to iron compounds in combination with oxygen in the Martian soil, it is a common ... When hemoglobin combines with CO, it forms a very bright red compound called carboxyhemoglobin, which may cause the skin of CO ...
Oxides and other inorganic compounds. Water (H. 2O) is an oxide of hydrogen and the most familiar oxygen compound. Hydrogen ... Crabtree, R. (2001). The Organometallic Chemistry of the Transition Metals (3rd ed.). John Wiley & Sons. p. 152. ISBN 978-0-471 ... The oxidation state of oxygen is −2 in almost all known compounds of oxygen. The oxidation state −1 is found in a few compounds ... Most of the organic compounds that contain oxygen are not made by direct action of O. 2. Organic compounds important in ...
Ethylene is a ligand in organometallic chemistry. One of the first organometallic compounds, Zeise's salt is a complex of ... Elschenbroich, C.; Salzer, A. (2006). Organometallics : A Concise Introduction (2nd ed.). Weinheim: Wiley-VCH. ISBN 978-3-527- ... Inhibitors of ethylene perception include compounds that have a similar shape to ethylene, but do not elicit the ethylene ... exceeds that of any other organic compound.[7][8] Much of this production goes toward polyethylene, a widely used plastic ...
Current Bioactive Compounds. 3 (1): 37-66. doi:10.1016/j.jallcom.2006.06.070.. CS1 maint: Multiple names: authors list (link) ... A Departure from Preformed Organometallic Reagents. Topics in Current Chemistry. 279. Springer Science & Business Media. pp. 25 ... an arsenic compound discovered in 1907 and used to treat syphilis.[146] This was later followed by sulfonamides (sulfa drugs) ... Derivatives of these compounds include epirubicin and idarubicin. Other clinically used drugs in the anthracyline group are ...
Transition metal compounds. From left to right, aqueous solutions of: Co(NO. 3). 2 (red); K. 2Cr. 2O. 7 (orange); K. 2CrO. 4 ( ... In the early 20th century, organic chemistry added Phthalo Blue, a synthetic, organometallic pigment with overwhelming tinting ... Vermilion, a toxic mercury compound favored for its deep red-orange color by old master painters such as Titian, has been ... Organic pigments such as diazo or phthalocyanine compounds feature conjugated systems of double bonds. Some inorganic pigments ...
Examples include the use of organometallic compounds such as Grignard (organomagnesium), organolithium, organocopper, and ... These compounds typically can add to an electron-deficient carbon atom such as at a carbonyl group. Nucleophilic alkylating ...
Organometallic compounds.[9]. Methods[change , change source]. Quantitative chemical analysis is a key part of environmental ... List of biomolecules · List of inorganic compounds · List of organic compounds · Periodic table ... Sigel, A. (2010). Organometallics in Environment and Toxicology. Metal Ions in Life Sciences. 7. Cambridge: RSC publishing. ... Organic compounds are commonly measured also using mass spectrometric methods, such as gas chromatography-mass spectrometry (GC ...
... is the chemical compound with the formula C6H5F, often abbreviated PhF. This species is a derivative of benzene, ... R.N. Perutz and T. Braun "Transition Metal-mediated C-F Bond Activation" Comprehensive Organometallic Chemistry III, 2007, ... PhF was first reported in 1886 by O. Wallach at the University of Bonn, who prepared the compound in two steps, starting also ... PhF is a relatively inert compound because the C-F bond is very strong. PhF is a useful solvent for highly reactive species, ...
... organometallic compound (CHEBI:25707). organozirconium compound (CHEBI:59743) is a organometallic compound (CHEBI:25707). ... organometallic compound (CHEBI:25707). organoiron compound (CHEBI:51185) is a organometallic compound (CHEBI:25707). organolead ... organometallic compound (CHEBI:25707). organoaluminium compound (CHEBI:51175) is a organometallic compound (CHEBI:25707). ... organometallic compound (CHEBI:25707). organocadmium compound (CHEBI:51183) is a organometallic compound (CHEBI:25707). ...
Open AccessReview Nitrogen Doped Carbon Nanotubes from Organometallic Compounds: A Review by Edward N. Nxumalo and Neil J. ... Organometallic compounds, molecules that contain at least one metal-carbon or metal-hydrogen bond, have had an enormous impact ... Organometallic compounds have also influenced material synthesis: Areas that have profited from the ready availability of ... Thus organometallic compounds are currently finding wider applications in material synthesis as well. This special issue ...
Organometallic Compounds from Waterstones today! Click and Collect from your local Waterstones or get FREE UK delivery on ... Spect Properties Inorganic & Organometallic Compounds (Hardback). Sign in to write a review ... Spectroscopic Properties of Inorganic and Organometallic Compounds provides a unique source of information on an important area ... vibrational spectroscopy of main group and transition element compounds and coordinated ligands; and electron diffraction. ...
Wiley-VCH, Weinheim Applied Homogeneous Catalysis with Organometallic Compounds The completely revised third edition of this ... Homogeneous Photocatalysis with Organometallic Compounds. Electrochemical Water Oxidation and Reduction Catalyzed by ... Applied Homogeneous Catalysis with Organometallic Compounds. A Comprehensive Handbook in Four Volumes. Cornils, Boy / Herrmann ... Electrochemical Water Oxidation and Reduction Catalyzed by Organometallic Compounds. Water Gas Shift Reactions. EPILOGUE. ...
... and the organometallic compound thus produced is further reacted with a metal carbonyl compound preferentially linking up with ... 4. Organometallic compounds according to claim 1, wherein the metal moiety on the olenic radical is formed by the carbonyl of a ... 3. Organometallic compounds according to claim 1, wherein the metal moiety on the carbocyclic radical is formed by the carbonyl ... ORGANOMETALLIC COMPOUNDS AND THEIR PREPARATION Filed May l?, 1962 United States Patent C) 5,5 12 Claims. (Cl. 260-429) This ...
organometallic compounds. as antibacterial agents. M. Patra, G. Gasser and N. Metzler-Nolte, Dalton Trans., 2012, 41, 6350 DOI ... organometallic compounds. as new classes of antibacterial agents. with potential for clinical development. ... The development of new classes of compounds to control the virulence of the pathogens is therefore urgently required. This ...
Applied Homogeneous Catalysis with Organometallic Compounds. A Comprehensive Handbook in Four Volumes. *Home ...
... and Organometallic Compounds, Volume 7 - 1st Edition. Print Book & E-Book. ISBN 9780444409133, 9780080868028 ... Reactions of Metallic Salts and Complexes, and Organometallic Compounds, Volume 7 1st Edition. 0.0 star rating Write a review ...
Emissive phosphorescent organometallic compounds are described that produce improved electroluminescence, particularly in the ... 0052] In one embodiment of the organometallic compounds of the present invention, the organometallic compound includes, in ... the compounds of the present invention are referred to herein as organometallic compounds since these compounds include a metal ... wherein the organometallic compound is present as a guest material dispersed in the host material, the organometallic compound ...
Purchase Monohydric Alcohols Their Ethers and Esters Sulphur Analogues Nitrogen Derivatives Organometallic Compounds - 2nd ... iv) General Methods of Preparation Of Organometallic Compounds. (v) General Physical Properties Of Organometallic Compounds. ( ... a. Compounds with Metal Bonded to One Carbon Atom in an Aliphatic Compound or Radical. b. Compounds with Metal Bonded to Two ... c. Compounds with Metal Bonded to Three Carbon Atoms in an Aliphatic Compound or Radical. d. Compounds with Metal Bonded to ...
Bonding Energetics in Organometallic Compounds with ISBN 9780841217911 and ISBN 0841217912. ... The acquisition, analysis, and understanding of metal-ligand bond energy information in organometallic molecules is an active ... It brings together carefully reviewed contributions from leading experimental researchers studying organometallic bonding ... Bonding Energetics in Organometallic Compounds. Bonding Energetics in Organometallic Compounds. by Marks, Tobin J. by Marks, ...
Mössbauer Effect Studies of Lattice-Dynamic Anisotropy and Line Asymmetry in Semiconductor and Organometallic Tin Compounds. ... Mössbauer Effect Studies of Lattice-Dynamic Anisotropy and Line Asymmetry in Semiconductor and Organometallic Tin Compounds. In ... Another prominent set of binary compounds belonging to this group is the series GeS, GeSe, SnS, and SnSe. This series of ... It has long been recognized that many group Iva/VIa binary compounds have characteristic semiconducting properties. In ...
Reaction of the Anticancer Organometallic Ruthenium Compound, [(. -Cymene)Ru(ATSC)Cl]. with Human Serum Albumin. Floyd A. ...
Reaction of the Anticancer Organometallic Ruthenium Compound, [(,svg style=vertical-align:-4.698pt;width:40.625px; id=M1 ... Reaction of the Anticancer Organometallic Ruthenium Compound, [(. -Cymene)Ru(ATSC)Cl]. with Human Serum Albumin. Figure 4. Plot ...
Then, organometallic species in the ppb range are separately detected according to their retention times. This technique has a ... Because of its high selectivity and high sensitivity, ZAA can be used as a new technique for organometallic species ... Nonvolatile, polar, thermally unstable molecules or high molecular weight compounds can be separated. In the present system, ... SPECIES DETERMINATION OF ORGANOMETALLIC COMPOUNDS USING ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY WITH LIQUID CHROMATOGRAPHY ...
Infrared and Raman Spectra of Inorganic and Coordination Compounds, Part B: Applications in Coordination, Organometallic, and ... Infrared and Raman Spectra of Inorganic and Coordination Compounds, Part B: Applications in Coordination, Organometallic, and ... organometallic, bioinorganic, and coordination compounds. From fundamental theories of vibrational spectroscopy to applications ... in a variety of compound types, it is extensively updated. Part B details applications of Raman and IR spectroscopy to larger ...
Boy Cornils is the editor of Applied Homogeneous Catalysis with Organometallic Compounds: A Comprehensive Handbook in Three ... Wolfgang A. Herrmann is the editor of Applied Homogeneous Catalysis with Organometallic Compounds: A Comprehensive Handbook in ... Applied Homogeneous Catalysis with Organometallic Compounds: A Comprehensive Handbook in Three Volumes, 2nd, Completely Revised ... Applied Homogeneous Catalysis with Organometallic Compounds: A Comprehensive Handbook in Three Volumes, 2nd, Completely Revised ...
Buy the Paperback Book The Organometallic Compounds of Zinc and Magnesium - Scholars Choice Edition by Henry Wren at Indigo.ca ...
C10L1/305-Organic compounds compounds not mentioned before (complexes) organo-metallic compounds (containing a metal to carbon ... The azulene compounds employed in our new organometallic compounds can be substituted with a wide variety of alkyl, aryl, ... Also, the azulene compounds employed in forming our new organometallic compounds can be substituted with groups other than ... An example of such a compound is bis(azulene) pentairon dodecacarbonyl. Preferred organometallic compounds, within the formula ...
... such as in the polymerization of the bond-containing compound of 2. The invention, to the organometallic compound, and a ... The present invention provides a useful novel organometal compound as a chain transfer agent, ... Produced an organometallic compound (1), the diene compound (B) and if all of the reaction of an organometallic compound (C) ... 유기 금속 화합물(1)] [Organometallic compound (1); 본 발명의 유기 금속 화합물은 하기 화학식 1로 표시되는 구조를 갖는 것을 특징으로 하고 있다. Organometallic compounds of ...
The nmr data for carbon 13 organometallic will confirm Dispatched to genotoxic orthodoxy killing. It may is up to 1-5 courses ... My nmr data for carbon 13 organometallic compounds Brad were me this Click as a incidence. add, along Show Up by Patricia Ryan ... Buy In this nmr data for carbon 13 organometallic compounds, one or high effects are to the DiscussionIn, which may or may here ... If you ve a nmr data for carbon 13 organometallic compounds for this rapamycin, would you Take to read moments through ...
The identification and quantification of inorganic and organometallic compounds in marine samples is of importance in studies ... speciation and determination of metals and organometallic compounds, notably those of the carbon-bonding main group elements ... of the marine food chain and the accumulation of both nutrients and potentially toxic compounds in higher order marine ... centered around providing an alternative procedure to existing methodology for the determination of organomercury compounds in ...
From biomolecules to organometallic compounds with tumor-inhibiting properties. Dissertation, University of Vienna. Fakultät ... Different approaches have been explored in this regard which resulted in compounds with cytotoxicity comparable or even ... arene compounds bearing sugar-derived bicy-clophosphite ligands. The complexes were characterized with regard to their stabil- ...
The classical method of preparation of these organometallic compounds from the metal carbonyl and organic compounds is the ... The classical method of preparation of these organometallic compounds from the metal carbonyl and organic compounds is the ... Schönberg A. (1968) Photochemical formation and reactions of organometallic compounds. In: Preparative Organic Photochemistry. ...
You are here: Home > Research > Homogeneous Catalysis with Organometallic Compounds Homogeneous Catalysis with Organometallic ... Homogeneous Catalysis with Organometallic Compounds Heterogeneous Catalysis, Biomass and Coal. Molecular Interactions in ... Organometallic Plastic Crystals. Organometallic Plastic Crystals. While plastic crystals (dynamically-orientationally ... Post-Doc at the Institute of Elementorganic Compounds in Moscow. 1975. Ph.D. at the University of Bochum. 1972. Studies at the ...
... numbers of organometallic compounds which can be used not only as catalysts (e.g., homogeneous catalysts), but also as ... screening and characterization of organometallic compounds and catalysts (e.g., homogeneous catalysts). The methods of the ... characterization of libraries of supported and unsupported organometallic compounds and catalysts (e.g., homogeneous catalysts ... The catalysts of the present invention are formally organometallic compounds. Certain of the organometallic compounds ofthe ...
... tungsten-containing organometallic compounds such as bis(2,4-dimethylpentadienyl)tungsten or tungsten halide compounds such as ... organometallic compound tertiary-butyltris-dimethylamido-titanium and a silicon-containing compound such as silane. The ... compounds. For example, by adding nitrogen-containing compounds such as amines, ammonia, and hydrazines to the silicon and ... Titanium silicide films incorporating various other compounds may be deposited using either of the heretofore described ...
Home , Studies on the reactivity of organometallic Ru-, Rh- and Os-pta complexes with DNA model compounds , HTML MARC ... aStudies on the reactivity of organometallic Ru-, Rh- and Os-pta complexes with DNA model compounds 000125797 269__ $$a2008 ...
1 Explain, using molecular orbital theory terms why the 18 electron rule is so important for organometallic compounds, yet it ... 1 Explain, using molecular orbital theory terms why the 18 electron rule is so important for organometallic compounds, yet it ... In organometallic chemistry the t2g orbitals actually participate in bonding in the Werner type complexes the t2g orbitals are ... In the organometallic octahedral complexes the t2g also are bonding orbitals and filling them contributes to the stability of ...
organometallic, interactions, ion, intramolecular, compounds, formation, borate, pairs, zirconium, noncovalent, metalцcarbonyl ... Noncovalent Interactions in Organometallic Compounds Formation of an Intramolecular MetalЦCarbon Ion Pair in Zirconium Borate ... F-F F F 4 Noncovalent Interactions in Organometallic Compounds: Formation of an Intramolecular Metal - Carbon Ion Pair in ... Electrostatically dominated bonding features are rather the rule with organometallic compounds of the electropositive main ...
  • While plastic crystals (dynamically-orientationally disordered mesogens) are so far rare in organometallic chemistry, we discovered that formally five-coordinate ionic Ni(II) complexes [(π-allyl)NiL 3 ]Y and neutral M(I) complexes (π-allyl)ML 3 (M = Co, Rh, Ir) with L = PMe 3 , P(OMe) 3 , and other ligands undergo a phase transition from the ordered to a plastic phase. (mpg.de)
  • For the ionic Ni compounds, besides motion of the anions Y, the cations appear to tumble on their site in the lattice, whereas the neutral M(I) complexes rotate about an axis. (mpg.de)
  • Synthesis of Phosphine-Rhodium Complexes Attached to a Standard peptide Synthesis Resin," Organometallics, vol. 15, pp. 4678-4680, (1996). (patentgenius.com)
  • In organometallic chemistry the t2g orbitals actually participate in bonding in the Werner type complexes the t2g orbitals are non bonding. (coursehero.com)
  • In the organometallic octahedral complexes the t2g also are bonding orbitals and filling them contributes to the stability of the molecule. (coursehero.com)
  • We discovered that the through-space spin coupling was not only a phenomenon detectable in fluorinated constrained organic molecules, but also in organometallic and coordinating compounds, and especially in palladium and group 10 coordination complexes of constrained polyphosphine ligands. (eurekaselect.com)
  • The use of auxiliary separation mechanisms to manipulate the separation selectivity of metal complexes and organometallic species is reviewed. (edu.au)
  • The structure and electrochemical behaviour of these novel cyano-carbon complexes is investigated and spectro-electrochemical methods are used to investigate the electronic structure of the cyanoacetylide compounds. (dur.ac.uk)
  • As in previous volumes material included covers the major areas of redox processes, reactions of the nonmetallic elements, reaction of inert and labile metal complexes and the reactions of organometallic compounds. (springer.com)
  • Compounds with, for example, metal-nitrogen, metal-oxygen, metal-phosphorus bonds are defined as coordination complexes, but are often described as organometallic. (mt.com)
  • The results show organometallic complexes Ln(C 8 H 8 ) 2 ¯ are typical "sandwich" structure. (sciencepublishinggroup.com)
  • E. A. Ziemann, S. Baljak, S. Steffens, T. Stein, N. V. Steerteghem, I. Asselberghs, K. Clays and J. Heck, 'Stille cross-coupling reaction with cationic [(η 5 -Cp)(η 6 -C 6 H 6-x I x )Ru] + complexes as key for ethynyl-bridged homo- and heteronuclear sandwich compounds' Organometallics vol. 34, pp. 1692-1700, 2015. (sciencepublishinggroup.com)
  • Some related compounds such as transition metal hydrides and metal phosphine complexes are often included in discussions of organometallic compounds, though strictly speaking, they are not necessarily organometallic. (wikipedia.org)
  • Research reports based on use of organometallic complexes in bioorganometallic chemistry, medicine, material sciences, homogeneous catalysis and energy conversion are also welcome. (elsevier.com)
  • The scope of the journal has been enlarged to encompass important research on organometallic complexes in bioorganometallic chemistry and material sciences , and of heavier main group elements in organometallic chemistry . (elsevier.com)
  • The first part of this thesis comprises the synthesis and biological evalua-tion of ruthenium(II)- and osmium(II)-arene compounds bearing sugar-derived bicy-clophosphite ligands. (univie.ac.at)
  • Another family of organometallic based catalysts with Josiphos diphosphine ligands, are used for enantioselective hydrogenation reactions. (mt.com)
  • The related but distinct term " metalorganic compound " refers to metal-containing compounds lacking direct metal-carbon bonds but which contain organic ligands. (wikipedia.org)
  • The organic ligands often bind the metal through a heteroatom such as oxygen or nitrogen, in which case such compounds are considered coordination compounds. (wikipedia.org)
  • However, if any of the ligands form a direct M-C bond, then complex is usually considered to be organometallic, e.g. (wikipedia.org)
  • Stereochemical and Stereophysical habit of Macrocycles bargains with the stereochemical and stereophysical homes of macrocyclic ligands and their coordination compounds. (zombiechatter.com)
  • Compound 1 features the 2D [Zn(L)]{sub n} layers built by μ{sub 3}-L bridging ligands and Zn(II) ions, which are further linked by pillared 1,4-bdc{sup 2−} ligands to form a 2-fold interpenetrating dmc framework. (osti.gov)
  • Compound 3 possesses a 2D layer structure which is accomplished by connecting ladder-chains to L ligands. (osti.gov)
  • A compound having bonds between one or more metal atoms and one or more carbon atoms of an organyl group. (ebi.ac.uk)
  • Therefore, it it is desired for technical purposes to introduce as many metal atoms as possible into the molecule of the organometallic compound the hydrocarbon moiety will be so selected that it includes as many double bonds as possible. (google.es)
  • In most organic compounds, carbon atoms tend to be electrophilic, but in organometallic compounds, because the metal atom is typically less electronegative than the carbon it is attached to, the carbon acts as a nucleophile of varying strength. (mt.com)
  • Organometallic compounds composed of metal atoms and organic molecular rings have unique physical and chemical properties, and show attractive applications in optoelectronic devices, catalysts, biosensors and so on. (sciencepublishinggroup.com)
  • In addition, an overview chapter provides an introduction to basic concepts and the various experimental methodologies employed, as well as an extensive bibliography of relevant review articles, textbooks, thermodynamic data compilations, and other source materials.Marks, Tobin J. is the author of 'Bonding Energetics in Organometallic Compounds' with ISBN 9780841217911 and ISBN 0841217912. (valorebooks.com)
  • Jump to navigation The download synthesis of organometallic compounds: a importance away seems each ocean you live to through the ' store to ' event. (sbcabeta.com)
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  • The large array of elements that can form organometallic compounds result in vast research in procedures for organometallic synthesis. (mt.com)
  • Various addition and elimination reactions form organometallic compounds from metallo-organic molecules. (mt.com)
  • In addition to the traditional metals, lanthanides, actinides, and semimetals, elements such as boron , silicon , arsenic , and selenium are considered to form organometallic compounds, e.g. organoborane compounds such as triethylborane (Et 3 B). (wikipedia.org)
  • Dear Colleagues, Organometallic compounds, molecules that contain at least one metal-carbon or metal-hydrogen bond, have had an enormous impact on the development of homogeneous catalysts. (mdpi.com)
  • The usefulness of organometallic compounds also expands beyond homogeneous catalysts to molecular-defined supported catalysts which are expected to combine the precise mechanistic feature of homogeneous systems with the robustness of heterogeneous catalysts. (mdpi.com)
  • Polymerizations are performed using catalysts such as Ziegler-Natta compounds, which are two-part catalysts often containing Ti and Al that polymerize olefins. (mt.com)
  • Organometallic compounds are widely used both stoichiometrically in research and industrial chemical reactions, as well as in the role of catalysts to increase the rates of such reactions (e.g., as in uses of homogeneous catalysis ), where target molecules include polymers, pharmaceuticals, and many other types of practical products. (wikipedia.org)
  • EP0978499A2 ] Methodologies for the synthesis, screening and characterisation of organometallic compounds and catalysts (eg homogenous catalysts), including combinatorial synthesis, screening and characterisation of libraries of supported and unsupported organometallic compounds and catalysts (eg homogenous catalysts). (epo.org)
  • The methods can be applied to the preparation and screening of large numbers of organometallic compounds which can be used not only as catalysts (eg homogeneous catalysts), but also as additives and therapeutic agents. (epo.org)
  • The list of contributors reads like a who-is-who in organometallic chemistry and homogeneous catalysis. (wiley.com)
  • The acquisition, analysis, and understanding of metal-ligand bond energy information in organometallic molecules is an active and important area of chemical research. (valorebooks.com)
  • The organic compound has a chemical structure as represented below: ##STR00001## wherein, A 1 is diisopropyl carbodiimide ligand, 5-(2-pyridyl)-1,2,4-triazole ligand, acetylacetone with phenyl group ligand, 2-phenyl-1,3,4-oxadiazole ligand, or derivatives thereof. (patentsencyclopedia.com)
  • The underlying molecular model symbolizes the water-soluble ligand of the organometallic complex. (b-ok.org)
  • W(CO) 3 (PPr i 3 ) 2 (η 2 -H 2 ) - the first compound to be synthesized with a dihydrogen ligand. (wikipedia.org)
  • Emissive phosphorescent organometallic compounds are described that produce improved electroluminescence, particularly in the blue region of the visible spectrum. (freepatentsonline.com)
  • Organic light emitting devices employing such emissive phosphorescent organometallic compounds are also described. (freepatentsonline.com)
  • [0003] The disclosure relates to an organometallic compound and organic electroluminescence device employing the same and, more particularly, to a phosphorescent organometallic compound and a phosphorescent organic electroluminescence device employing the same. (patentsencyclopedia.com)
  • Moreover, dicyclopentadienyl iron compounds are known (usually referred to as ferfocenes) in which an iron, cobalt, nickel or ruthenium atom is bound by fr-bonds to two cyclopentadiene radicals. (google.es)
  • Three representative medicinally relevant compounds, cisplatin, transplatin and the organometallic ruthenium compound RAPTA-C, were reacted with a pool of three proteins, ubiquitin, cytochrome c and superoxide dismutase, and the reaction products were analysed using high-resolution mass spectrometry. (cf.ac.uk)
  • Carbon-metal bonds are generally due to high reactivity, has a wide range of reactivity depending on the type and the metal species of the organic, organometallic compounds, including a variety of organic synthetic reactions integral it should not react according to the current chemical industry tense (試劑) It is supposed to. (google.com)
  • The Stereochemistry of Organometallic Compounds. (monash.edu)
  • CH9860303 The Stereochemistry of Organometallic Compounds .XXVII. (publish.csiro.au)
  • d. spectra) were then used, together with chemical arguments, to correlate the stereochemistry of these derivatives, in exactly the same way as has been done for many organic compounds [10, 32, 220]. (zombiechatter.com)
  • Nonvolatile, polar, thermally unstable molecules or high molecular weight compounds can be separated. (unt.edu)
  • 3. The process of claim 1, wherein the PECVD chamber has a remote source plasma generator, and wherein said portion of the silicon-containing compound molecules, but no tertiary-butyltris-dimethylamido-titanium molecules, is converted to aplasma. (patentgenius.com)
  • 5. The process of claim 1, which further comprises the step of admitting a nitrogen-containing compound into said chamber in combination with said tertiary-butyltris-dimethylamido-titanium molecules and said silicon-containing compound, saidnitrogen-containing compound being selected from the group consisting of amines, ammonia, and hydrazines, thereby incorporating nitrogen in the deposited predominantly titanium silicide film. (patentgenius.com)
  • One of the most used methods to synthesize an organometallic compound is to react the pure metal with specific organic molecules . (mt.com)
  • Organometallic reagents are frequently used to synthesize organic molecules since they drive specific bonding and/or catalyze reactions. (mt.com)
  • [1] Aside from bonds to organyl fragments or molecules, bonds to 'inorganic' carbon, like carbon monoxide (metal carbonyls), cyanide, or carbide, are generally considered to be organometallic as well. (wikipedia.org)
  • These topics are followed by the classification, nomenclature, preparation, and reactions of other aliphatic compound derivatives, including nitrogen derivatives and sulfur analogues. (elsevier.com)
  • even though simply inorganic compounds of tin(n) and leaden) are popular, just about all organo crew IV derivatives express an oxidation nation of IV. (zombiechatter.com)
  • This article uses equations for partition coefficients of compounds from water and the gas phase to various solvents to obtain descriptors for pentane-2,4-dione and 21 of its derivatives. (unt.edu)
  • Organometallic compounds have also influenced material synthesis: Areas that have profited from the ready availability of volatile, stoichiometrically precisely defined molecular compounds of the metallic elements including synthesis of materials (metals, alloys, semi-conductors) by vapor deposition, of new molecular magnetic and electro optical materials (non-linear optics), of metal-organic frameworks as gas adsorbents, of metal-containing polymers, and of metallomeogens. (mdpi.com)
  • The goal of this doctoral research was to develop and apply analytical methodology to the sampling, isolation, speciation and determination of metals and organometallic compounds, notably those of the carbon-bonding main group elements such as mercury, tin and selenium in marine samples. (umass.edu)
  • Organometallic chemistry is the study of organometallic compounds , chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal , including alkaline, alkaline earth, and transition metals, and sometimes broadened to include metalloids like boron, silicon, and tin, as well. (wikipedia.org)
  • Tetracarbonyl nickel , and ferrocene are examples of organometallic compounds containing transition metals . (wikipedia.org)
  • Typical pollutants include gasoline, motor oil and other hydrocarbon compounds, metals, nutrients and sediment (soil). (wikipedia.org)
  • More sophisticated approaches are used in the determination of trace metals and organic compounds. (wikipedia.org)
  • Decarbonylation of a metallo-organic will produce an organometallic compound. (mt.com)
  • This arises from the use of organometallic reagents in the synthesis of an enormous number of commercially important compounds, widely used in the pharmaceutical, polymer, and petrochemical industries. (mt.com)
  • There are also research efforts in the use of organometallic reagents in the synthesis of ever-more complex and tailored organic compound, for which organometallic reagents drive specific bonding and/or catalyze reactions. (mt.com)
  • Examples of this type of synthesis are two of the most frequently used organometallic reagents, organolithium and organomagnesium, for which the metal is reacted with an alkyl- or aryl-halide to form the desired reagent. (mt.com)
  • In double-decomposition reactions , metal halides exchange with alkylating reagents to yield the organometallic reagent. (mt.com)
  • The bonds in organolithium compounds are more strongly polarized than in their organomagnesium analogs (Grignard reagents), making organolithium a stronger nucleophile and more reactive compared to the Grignard. (mt.com)
  • Examples of such organometallic compounds include all Gilman reagents , which contain lithium and copper . (wikipedia.org)
  • For instance, lithium enolates often contain only Li-O bonds and are not organometallic, while zinc enolates (Reformatsky reagents) contain both Zn-O and Zn-C bonds, and are organometallic in nature. (wikipedia.org)
  • Yet these elements form a variety of organometallic compounds ($\ce{PhLi}$, the whole family of Grignard reagents, etc). (stackexchange.com)
  • Seebach's injunction, "Thinking of polar organometallic compounds as carbanions is an impoverishment rather than a simplification" (International Symposium, Chemistry of Carbanions, Durham 1984), stresses the need to consider the metal not only as an integral, but perhaps also as the key component of these reagents. (springer.com)
  • More particularly, the invention relates to useful, magnesium, zinc, aluminum, or gallium organometal compound and a production method containing a chain transfer agent or an organic synthesis reagent of the polymerization reaction of the bond-containing compound of 2. (google.com)
  • Tetrameric [{RZn(NHNMe2)}(4)] (R - Me, Et), the first organometallic zinc hydrazides to be described, have been prepared by alkane elimination from dialkylzinc solutions and N,N-dimethylhydrazine. (uni-bielefeld.de)
  • For each of the following pairs of ions, write the formula of the corresponding compound. (bartleby.com)
  • Gas-phase chemistry of first-row transition steel ions with nitrogen-containing compounds : theoretical and experimental investigations / A. Mavridis, ok. (letswheelthewheels.com)
  • When a strongly electronegative metal is involved, the charge distribution is such that the compound is more ionic in nature and can be strongly reactive. (mt.com)
  • For example, in organolithium compounds the C-Li bond is more ionic and the C is more negatively polarized. (mt.com)
  • A method of preparing an ultra-pure organometallic compound comprising using a microchannel device and ionic liquid solvent to produce an ultra-pure alkylmetal compound for processes such as chemical vapor deposition. (ipexl.com)
  • Elements of these groups are highly ionic, and I've never heard of them forming significantly covalent inorganic compounds. (stackexchange.com)
  • It is estimated that nearly 50% of inorganic compounds and 30% of organic molecular solids have been confirmed to have TL [ 6 ]. (intechopen.com)
  • A process for depositing titanium suicide films via chemical vapor deposition takes place in a deposition chamber that has been evacuated to less than atmospheric pressure and utilizes, as reactants, the organometallic compound tertiary-butyltris-dimethylamido-titanium and a silicon-containing compound such as silane. (patentgenius.com)
  • Titanium silicide films incorporating various other compounds may be deposited using either of the heretofore described embodiments of the process by adding other precursors to the TBTDMAT and the silicon-containing compounds. (patentgenius.com)
  • For example, by adding nitrogen-containing compounds such as amines, ammonia, and hydrazines to the silicon and titanium precursors and using the same reaction parameters, a film having the general composition TiSi.sub.X N.sub. (patentgenius.com)
  • Additionally, by adding tungsten-containing organometallic compounds such as bis(2,4-dimethylpentadienyl)tungsten or tungsten halide compounds such as WF.sub.6 or WCl.sub.6 to the silicon and titanium precursors, a titanium silicide film having the general formula TiSiW can be deposited. (patentgenius.com)
  • 2. The process of claim 1, wherein said silicon-containing compound is selected from the group consisting of silane, chlorinated silanes, fluorinated silanes and organometallic silicon compounds. (patentgenius.com)
  • Organometallic compounds may contain group 1 alkali, group 2 alkali earth, group 3-12 transition, and 13-15 main group elements, as well as metalloids, such as boron and silicon. (mt.com)
  • 1839), for many years a professor at the Massachusetts Institute of Technology, Boston, he obtained various organometallic compounds of silicon. (yourdictionary.com)
  • During the past ten years a variety of methods involving mass spectrom- etry have been developed for the analysis of environmentally important compounds. (springer.com)
  • With its environmental download mass spectrometry of inorganic coordination and organometallic tool, pp. is a book. (mollycoddle.org)
  • CDbaby civil download mass spectrometry of inorganic coordination and organometallic compounds tools is supplied by Glencoe Software, Inc. National Academy of Sciences. (mollycoddle.org)
  • One download mass spectrometry of inorganic coordination and organometallic compounds shows stochastic, right-click about author of 60 requests, working that at least two single management systems are before Confederate regulation of separate composers. (mollycoddle.org)
  • Electrospray ionisation mass spectrometry was used to analyse the reactions of metal compounds with mixtures of selected proteins. (cf.ac.uk)
  • Organic compounds are commonly measured also using mass spectrometric methods, such as Gas chromatography-mass spectrometry (GC/MS) and Liquid chromatography-mass spectrometry (LC/MS). Tandem Mass spectrometry MS/MS and High Resolution/Accurate Mass spectrometry HR/AM offer sub part per trillion detection. (wikipedia.org)
  • Why do Magnesium and Lithium form *covalent* organometallic compounds? (stackexchange.com)
  • 260-429) This invention relates to organometallic compounds of the kind in which at least one transition-metal carbonyl group is bound by a 1r-bond to a hydrocarbon or substituted-hydrocarbon molecule having available 1r electrons. (google.es)
  • The invention consists in organometallic compounds comprising a hydrocarbon moiety composed of at least one cyclic component having available 11F-electrons and being connected to at least one oletinic chain component having at least two conjugated double bonds, and a transition-metal carbonyl moiety connected by a ir-bond to either the cyclic nucleus -or the side chain. (google.es)
  • Sirius Pixels HDe AVC Encoder book Organometallic Compounds in Industry 1971 element: distributed Atrial Occlusion, more clinical than at hormone, which Refers inspired in therapy to bind cornea of left antigens, acutely immunogenic and saturated, but also sub-cellular morbidity. (siriuspixels.com)
  • By March 1971, it spent However used out its 2014Startup download Organometallic Compounds of Low and walked thought affected into eight 2018I. (trustypup.com)
  • Granted, bonds with carbon are also going to be weaker than in say LiCl, but that's what makes organometallic compounds actually work to form carbon-carbon bonds. (stackexchange.com)
  • Organometallic compounds are defined as compounds that contain metal - carbon bonds. (elsevier.com)
  • Among the most common high-resolution nuclear magnetic resonance parameters (NMR parameters), nuclear spin-spin coupling provides decisive data for organic, organometallic, biological and coordination compounds characterization. (eurekaselect.com)
  • The users in this blood blood the left mitiglinide--cf that population- affecting is a current life to contractile heart with been data by Pertaining sodium failure such to venous end-stage email, including Emphysema study addition, and using numerous White body and biological compound effectiveness with concerned cerebrum. (siriuspixels.com)
  • The platinum compounds were less reactive and considerably less selective in protein binding than RAPTA-C, which showed a high affinity towards ubiquitin and cytochrome c, but not superoxide dismutase. (cf.ac.uk)
  • However, names such as "Zeise's compound", "Reihlen's butadiene iron tricarbonyl" and "Hein's polyphenylchromium compounds", none of whose structures were known, remained latent in my memory through over seven years as a nuclear chemist. (b-ok.org)
  • The scope of this thesis was to investigate organometallic compounds by advanced solution state NMR methods in order to build a bridge from known solid state structures to their behaviour in solution. (uni-goettingen.de)
  • I was first made aware of organometallic compounds through reading Modern Aspects of Inorganic Chemistry (1935) by two academics, H. J. EmelCus and J. S. Anderson at Imperial College, London, where I was a student. (b-ok.org)
  • It brings together carefully reviewed contributions from leading experimental researchers studying organometallic bonding energetics in the gas phase, in solution, and on well-characterized surfaces. (valorebooks.com)
  • It results located that severe congestive various Microtubules of L-arginine die found for other mononuclear segments of and(ii and the Data and that ischemic L-arginine will be shop mechanisms of reactions of organometallic compounds with surfaces arteries by searching implantation of SOA. (birgitkohnen-pflegedienst.de)
  • This perspective describes the historical development in brief and recent advances on the preparation of small organometallic compounds as new classes of antibacterial agents with potential for clinical development. (rsc.org)
  • In recognition of the increasing importance of the determination of volumes of activation in understanding the mechanisms of both inorganic and organometallic reactions a special reference section giving tabulated Ll V* values has been included and this extensive compilation will be updated in future volumes. (springer.com)
  • The Journal of Organometallic Chemistry targets original papers dealing with theoretical aspects, structural chemistry, synthesis, physical and chemical properties (including reaction mechanisms), and practical applications of organometallic compounds . (elsevier.com)
  • Organometallic reaction mechanisms 1. (ncl.ac.uk)
  • In its simplest form, which may be regarded as a prototype, the hydrocarbon moiety of an organometallic compound according to the invention comprises a cyclic component, e.g. a benzene nucleus, and a butadiene side chain, and the metal carbonyl moiety is connected by a ir-bond to either the nucleus or the side chain. (google.es)
  • It is an organometallic compound, a carbon-refers to a compound having a metal bond (hydrogen - in some cases containing a metal hydride compound has a bond). (google.com)
  • The classical method of preparation of these organometallic compounds from the metal carbonyl and organic compounds is the thermal process. (springer.com)
  • Organometallic compounds: Compound which containing at least one metal-to-carbon bond where the carbon is part of an organic group are Organometallic compounds. (assignmenthelp.net)
  • Noncovalent Interactions in Organometallic Compounds Formation of an Intramolecular MetalЦCarbon Ion Pair in Zirconium Borate Betaines. (docme.ru)
  • The classic definition of an organometallic is a molecule that contains a metal atom bonded to a carbon atom. (mt.com)
  • Hydrometalation is a synthesis method in which a molecule with a metal -hydrogen bond reacts with an organic molecule containing a double bond, forming a organometallic with a metal-carbon bond. (mt.com)
  • A method of preparing an ultra-pure organometallic compound comprising using a microchannel device for synthesis in reacting a metal halide with an alkylating agent to produce an ultra-pure alkylmetal compound for processes such as chemical vapor deposition. (ipexl.com)
  • Furthermore, many lipophilic compounds such as metal acetylacetonates and metal alkoxides are called "metalorganics. (wikipedia.org)
  • in the absence of direct structural evidence for a carbon-metal bond, such compounds are not considered to be organometallic. (wikipedia.org)
  • Organometallic compounds have significant covalent character (i.e., the bond can be called covalent) in the carbon-metal bond. (stackexchange.com)
  • designating or of a compound containing carbon and a metal or nonmetal, specif. (yourdictionary.com)
  • Of, relating to, or constituting an organic compound containing a metal, especially a compound in which a metal atom is bonded directly to a carbon atom. (yourdictionary.com)
  • The need for additional nomenclature for organometallic compounds became apparent in the mid-1950s when Dunitz, Orgel , and Rich described the structure of the " sandwich complex " ferrocene by X-ray crystallography [6] where an iron atom is "sandwiched" between two parallel cyclopentadienyl rings. (wikipedia.org)
  • Iron forms compounds in a wide range of oxidation states , −2 to +7. (wikipedia.org)
  • Recently, we have shown the importance of serum-protein interactions to the speciation of these compounds, which lead to the maintenance of their Ru(III) oxidation state and influence aquation and oligomerization processes. (sfu.ca)
  • Applied Homogeneous Catalysis with Organometallic Compounds Volume 1: Applications Edited by B. Cornils and W. A. Herrmann Further Titles of Interest B. Cornils, W. A. Herrmann, R . Schlogl, C.-H. Wong (Eds. (b-ok.org)
  • Enzyme Catalysis in Organic Synthesis A Comprehensive Handbook in Three Volumes Second, Completely Revised and Enlarged Edition 2002, ISBN 3-527-29949-1 Applied Homogeneous Catalysis with Organometallic Compounds A Comprehensive Handbook in Three Volumes Volume 1: Applications Edited by Boy Cornils and Wolfgang A. Herrmann Second, Completely Revised and Enlarged Edition 683wI LEY-VCH Prof. Dr. Boy Cornils Kirschgartenstrarje 6 D-65719 Hofheim Germany Prof. Dr. Dr. h.c. mult. (b-ok.org)
  • Some important consequences in structural characterization of the compounds in solution are discussed. (eurekaselect.com)
  • Your Web book Organometallic Compounds in Industry does thereof interviewed for heart. (siriuspixels.com)
  • The organometallic compound of the disclosure can be applied in an organic electroluminescent device for enhancing the electroluminescent efficiency thereof. (patentsencyclopedia.com)
  • Boy Cornils is the editor of Applied Homogeneous Catalysis with Organometallic Compounds: A Comprehensive Handbook in Three Volumes, 2nd, Completely Revised and Enlarged Edition, published by Wiley. (wiley.com)
  • From fundamental theories of vibrational spectroscopy to applications in a variety of compound types, it is extensively updated. (wiley.com)
  • vol. 67(8)1128 (1995), the inventors of said prior art patent estimated that low-resistant cubic TaN could be formed because Ta═NtBu in the starting compound, that is, the strong bond of Ta═N was preserved and integrated in the cubic system. (google.com)
  • 8. The organometallic compound as claimed in claim 1, wherein A 1 is bonded with Ir via a carbon atom on one side, and bonded with Ir via a nitrogen atom on the other side. (patentsencyclopedia.com)
  • 1991, Electroanalytical studies of inorganic and organometallic compounds using conventional and microsized electrodes, Ph.D. thesis, Dept. of Chemical and Analytical Sciences, Deakin University. (edu.au)