Diazonium CompoundsSulfanilic Acids: Aminobenzenesulfonic acids. Organic acids that are used in the manufacture of dyes and organic chemicals and as reagents.Azo CompoundsMycological Typing Techniques: Procedures for identifying types and strains of fungi.Bilirubin: A bile pigment that is a degradation product of HEME.Optical Fibers: Thin strands of transparent material, usually glass, that are used for transmitting light waves over long distances.Titanium: 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)Surface Properties: Characteristics or attributes of the outer boundaries of objects, including molecules.Fiber Optic Technology: The technology of transmitting light over long distances through strands of glass or other transparent material.Coated Materials, Biocompatible: Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.Polymers: Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).Microscopy, Electron, Scanning: Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.Trinitrobenzenesulfonic Acid: A reagent that is used to neutralize peptide terminal amino groups.Alkenes: Unsaturated hydrocarbons of the type Cn-H2n, indicated by the suffix -ene. (Grant & Hackh's Chemical Dictionary, 5th ed, p408)Benzene: Toxic, volatile, flammable liquid hydrocarbon byproduct of coal distillation. It is used as an industrial solvent in paints, varnishes, lacquer thinners, gasoline, etc. Benzene causes central nervous system damage acutely and bone marrow damage chronically and is carcinogenic. It was formerly used as parasiticide.Sulfonic Acids: Inorganic or organic oxy acids of sulfur which contain the RSO2(OH) radical.Phenol: An antiseptic and disinfectant aromatic alcohol.Colitis: Inflammation of the COLON section of the large intestine (INTESTINE, LARGE), usually with symptoms such as DIARRHEA (often with blood and mucus), ABDOMINAL PAIN, and FEVER.NitrobenzenesSulfur Compounds: Inorganic or organic compounds that contain sulfur as an integral part of the molecule.Sulfur: An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine.Wettability: The quality or state of being wettable or the degree to which something can be wet. This is also the ability of any solid surface to be wetted when in contact with a liquid whose surface tension is reduced so that the liquid spreads over the surface of the solid.Caproates: Derivatives of caproic acid. Included under this heading are a broad variety of acid forms, salts, esters, and amides that contain a carboxy terminated six carbon aliphatic structure.Pentanoic AcidsFormularies as Topic: Works about lists of drugs or collections of recipes, formulas, and prescriptions for the compounding of medicinal preparations. Formularies differ from PHARMACOPOEIAS in that they are less complete, lacking full descriptions of the drugs, their formulations, analytic composition, chemical properties, etc. In hospitals, formularies list all drugs commonly stocked in the hospital pharmacy.Economics, Pharmaceutical: Economic aspects of the fields of pharmacy and pharmacology as they apply to the development and study of medical economics in rational drug therapy and the impact of pharmaceuticals on the cost of medical care. Pharmaceutical economics also includes the economic considerations of the pharmaceutical care delivery system and in drug prescribing, particularly of cost-benefit values. (From J Res Pharm Econ 1989;1(1); PharmacoEcon 1992;1(1))Drug Industry: That segment of commercial enterprise devoted to the design, development, and manufacture of chemical products for use in the diagnosis and treatment of disease, disability, or other dysfunction, or to improve function.Academies and Institutes: Organizations representing specialized fields which are accepted as authoritative; may be non-governmental, university or an independent research organization, e.g., National Academy of Sciences, Brookings Institution, etc.Security Measures: Regulations to assure protection of property and equipment.Encyclopedias as Topic: 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)ImidesAmaranth Dye: A sulfonic acid-based naphthylazo dye used as a coloring agent for foodstuffs and medicines and as a dye and chemical indicator. It was banned by the FDA in 1976 for use in foods, drugs, and cosmetics. (From Merck Index, 11th ed)Oxidative Coupling: The reaction of two molecular entities via oxidation usually catalyzed by a transition metal compound and involving dioxygen as the oxidant.AmidinesTextilesCarboxylic Acids: Organic compounds containing the carboxy group (-COOH). This group of compounds includes amino acids and fatty acids. Carboxylic acids can be saturated, unsaturated, or aromatic.Free Radicals: Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated.Monocarboxylic Acid Transporters: A family of proteins involved in the transport of monocarboxylic acids such as LACTIC ACID and PYRUVIC ACID across cellular membranes.Acrylic ResinsHydroxyl Radical: The univalent radical OH. Hydroxyl radical is a potent oxidizing agent.Dicarboxylic AcidsCoumaric Acids: Hydroxycinnamic acid and its derivatives. Act as activators of the indoleacetic acid oxidizing system, thereby producing a decrease in the endogenous level of bound indoleacetic acid in plants.Polyurethanes: A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Peroxides: A group of compounds that contain a bivalent O-O group, i.e., the oxygen atoms are univalent. They can either be inorganic or organic in nature. Such compounds release atomic (nascent) oxygen readily. Thus they are strong oxidizing agents and fire hazards when in contact with combustible materials, especially under high-temperature conditions. The chief industrial uses of peroxides are as oxidizing agents, bleaching agents, and initiators of polymerization. (From Hawley's Condensed Chemical Dictionary, 11th ed)Palladium: A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.Tensile Strength: The maximum stress a material subjected to a stretching load can withstand without tearing. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p2001)Polymerization: Chemical reaction in which monomeric components are combined to form POLYMERS (e.g., POLYMETHYLMETHACRYLATE).Surface-Active Agents: Agents that modify interfacial tension of water; usually substances that have one lipophilic and one hydrophilic group in the molecule; includes soaps, detergents, emulsifiers, dispersing and wetting agents, and several groups of antiseptics.Microscopy, Ultraviolet: Microscopy in which the image is formed by ultraviolet radiation and is displayed and recorded by means of photographic film.Suspensions: Colloids with liquid continuous phase and solid dispersed phase; the term is used loosely also for solid-in-gas (AEROSOLS) and other colloidal systems; water-insoluble drugs may be given as suspensions.Pimpinella: A plant genus in the family APIACEAE (Umbelliferae) that is used in SPICES and is a source of anethole.Benzocaine: A surface anesthetic that acts by preventing transmission of impulses along NERVE FIBERS and at NERVE ENDINGS.Water: A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
... s can be obtained via aryl diazonium salts. Alternatives for these salts are certain aryl triazenes and aryl ... The parent compound is the phenyl radical C6H5.. Aryl radicals are intermediates in certain organic reactions. ... An Aryl radical in organic chemistry is a reactive intermediate and an arene compound incorporating one free radical carbon ... Aryl bromides and iodides can be converted to aryl radicals via tributyltin hydride and related compounds and silyl hydrides. ...
... is an organic compound with the formula [C6H5N2]Cl. It is a salt of a diazonium cation and chloride. ... 2 H2O The reactions are conducted at low temperature to minimize decomposition of the diazonium salt. The diazonium salt is not ... Because the salt is unstable, it is not commercially available but is prepared upon demand. This compound is prepared by ... The compound is explosive. March, J. (1992). Advanced Organic Chemistry (4th ed.). New York: J. Wiley and Sons. ISBN 0-471- ...
The compound is synthesized by coupling the diazonium salt derived from dichloroaniline with the pyrazolone. The structure of ... Pigment Yellow 10 is an organic compound that is classified as a Monoazopyrazolone pigment. It is used as a yellow colorant, ...
Water-soluble diazonium salts react with carbon nanotubes via charge transfer in which they extract electrons from SWNT and ... Moreover, these reactions allow for combining unique properties of SWNTs with those of other compounds. Above all, the ... Two important addition reactions of SWNT sidewall are: (1) Fluorination, and (2) Aryl diazonium salt addition. These functional ... Diazonium reagent and SWNT reaction has a two step mechanism. First, the diazonium reagent adsorbs noncovalently to an empty ...
... the diazonium compound is also aromatic. The process of conversion of primary aromatic amines into its diazonium salt is called ... An azo coupling is an organic reaction between a diazonium compound and another aromatic compound that produces an azo compound ... Diazonium salts are important synthetic intermediates that can undergo coupling reactions to form azo dyes and electrophilic ... The related dye called aniline yellow is produced from the reaction of aniline and the diazonium salt. Naphthols are popular ...
... to give the azido compound. Aryl azides may be prepared by displacement of the appropriate diazonium salt with sodium azide, or ... Protonation of azide salts gives toxic hydrazoic acid in the presence of strong acids: H+ + N− 3 → HN3 Azide salts may react ... RN3 A classic method for the synthesis of azides is the Dutt-Wormall reaction in which a diazonium salt reacts with a ... Azide salts can decompose with release of nitrogen gas as discussed under Applications. The decomposition temperatures of the ...
The resulting bisacetoacetylated compound is coupled with two equiv of the diazonium salt obtained from 2,4-dichloroaniline. K ... Pigment Yellow 16 is an organic compound that is classified as a diarylide pigment. Pigment Yellow 16 is used as a yellow ... The compound is obtained via acetoacetylation of o-tolidine using diketene. ...
"Reaction of diazonium salts with transition metals-III Palladium(0)-catalyzed arylation of unsaturated compounds with ... "Reaction of Diazonium Salts with Transition Metals. I. Arylation of Olefins with Arenediazonium Salts Catalyzed by Zero Valent ... The proposed Heck catalytic cycle involving cationic palladium with diazonium salts was reinforced by studies with mass ... The use of arenediazonium salts presents some advantages over traditional aryl halide electrophiles, for example, the use of ...
It reacts with nitrous acid to form diazonium salt, which can undergo coupling reaction to form an azo compound. As azo- ... Amines react with nitrous acid to give diazonium salts. The alkyl diazonium salts are of little synthetic importance because ... Anilines and naphthylamines form more stable diazonium salts, which can be isolated in the crystalline form. Diazonium salts ... Quaternary ammonium salts exist with many kinds of anions. Amines are named in several ways. Typically, the compound is given ...
The nucleophilic addition of the enolate anion 2 to the diazonium salt produces the azo compound 3. Intermediate 3 has been ... and aryl diazonium salts. The Reaction is named after the chemists Francis Robert Japp and Felix Klingemann. The hydrazone ... indoles and related compounds. Part I. A new synthesis of 3,4-dihydrobenz[cd]indol-5(1H)-one (Uhle's ketone)". J. Chem. Soc. ...
Since diazonium salts are often unstable near room temperature, the azo coupling reactions are typically conducted near ice ... Some azo compounds, e.g., methyl orange, are used as acid-base indicators due to the different colors of their acid and salt ... Azo compounds are compounds bearing the functional group R−N=N−R′, in which R and R′ can be either aryl or alkyl. IUPAC defines ... Alkyl azo compounds[edit]. Aliphatic azo compounds (R and/or R′ = aliphatic) are less commonly encountered than the aryl azo ...
To make the dyes, acetoacetanilides are coupled to diazonium salts, "azo coupling". K. Hunger. W. Herbst "Pigments, Organic" in ... Acetoacetanilide is an organic compound with the formula CH3C(O)CH2C(O)NHC6H5. It is the acetoacetamide derivative of aniline. ... It and many related compounds (prepared from various aniline derivatives) are used in the production of organic pigments called ...
The modification of carbon nanotubes with aryl diazonium salts was studied first by Tour et al. Due to the harsh conditions ... One end of the molecule are polyaromatic compounds that interact with the carbon nanotube through π-π stacking. The other end ... The diazonium chemistry functionalized carbon nanotubes which was used as a precursor to further modifications. Suzuki and Heck ... In one type of chemical modification, aniline is oxidized to a diazonium intermediate. After expulsion of nitrogen, it forms a ...
... s can also be synthesized by the Japp-Klingemann reaction via β-keto-acids or β-keto-esters and aryl diazonium salts. ... Hydrazones are a class of organic compounds with the structure R 1R 2C=NNH 2. They are related to ketones and aldehydes by the ... The compound carbonyl cyanide-p-trifluoromethoxyphenylhydrazone (abbreviated as FCCP) is used to uncouple ATP synthesis and ... Hydrazones are reactants in hydrazone iodination, the Shapiro reaction and the Bamford-Stevens reaction to vinyl compounds. A ...
... are converted to their diazonium salts using nitrous acid. For example, copper(I) chloride converts diazonium salts to the aryl ... Compounds such as para-bromonitrobenzene cannot form stable Grignards directly, as their aromatic rings are too deactivated. If ... The two main preparatory routes to aryl halides are direct halogenation and via diazonium salts. In the Friedel-Crafts ... Gatterman Reaction can also be used to convert Diazonium salt to chlorobenzene or bromobenzene by using copper powder instead ...
... series of studies the mercury nitrate first takes benzene to the corresponding nitroso compound and through the diazonium salt ...
... and the diazonium salt on boiling with alcohol yielded phenylphenazonium salts. Aposafranone, C18H12N2O, is formed by heating ... These three compounds are perhaps to be represented as ortho- or as para-quinones. The "safranine" of commerce is an ortho- ... It can be readily diazotized, and the diazonium salt when boiled with alcohol yields aposafranine or benzene induline, C18H12N3 ... Both compounds behave essentially identically in biological staining applications, and most manufacturers of safranin do not ...
It couples with various aryl diazonium salts to give diazo dyes. Oxidation with chromium trioxide gives juglone, a naturally ... 1,5-Dihydroxynaphthalene is an organic compound with the formula C10H6(OH)2. It is one of several isomers of ...
NOHSO4 is useful in organic chemistry to prepare diazonium salts from amines. Related NO-delivery reagents include nitrosonium ... Nitrosylsulfuric acid is the chemical compound with the formula NOHSO4. It is a colourless solid that is used industrially in ...
A reported reaction of alkene acrylic acid with an aryl diazonium salt and copper(I) bromide and hydrobromic acid yields the α- ... to an electron-poor alkene usually supported by a metal salt. The reaction product is an alkylated arene compound. The reaction ... In a novel kilogram-scale metal-free Meerwein arylation the diazonium salt is formed from 2-nitroaniline, the alkene ... The Meerwein arylation is an organic reaction involving the addition of an aryl diazonium salt (ArN2X) ...
... which are reactive toward diazonium salts to give deeply colored azo compounds. Azo coupling of 3-hydroxy-2-naphthoic acid ... 3-Hydroxy-2-naphthoic acid is an organic compound with the formula C10H6(OH)(CO2H). It is one of the several carboxylic acids ...
The arene compound 1 (here benzene) is coupled with base with the diazonium salt 2 to the biaryl 3 through an intermediate aryl ... given the many side-reactions of diazonium salts. Several improvements have been suggested. One possibility is to employ ... is an aryl-aryl coupling reaction via a diazonium salt. ... C6H5 The reaction offers a wide scope for both diazonium ... "The Synthesis of Biaryl Compounds by Means of the Diazo Reaction". J. Am. Chem. Soc. 42 (10): 2339-2343. doi:10.1021/ ...
Rev., 1995, 95 (7), pp 2457-2483 doi:10.1021/cr00039a007 Diazonium Salts as Substrates in Palladium-Catalyzed Cross-Coupling ... In one important reaction type a main group organometallic compound of the type RM (R = organic fragment, M = main group centre ... Rev., 2011, 111 (3), pp 2251-2320 doi:10.1021/cr100355b Palladium-Catalyzed Cross-Coupling Reactions of Organoboron Compounds ... an unusual coupling reaction was described in which an organomolybdenum compound, [Mo3(CCH3)2(OAc)6(H2O)3](CF3SO3)2 not only ...
PhAsO3H2 can be prepared in several routes, but a common one entails treatment of phenyl diazonium salts with sodium arsenite ( ... The compound is a buffering agent and a precursor to other organoarsenic compounds, some of which are used in animal nutrition ... Phenylarsonic acid is the chemical compound with the formula C6H5AsO(OH)2, commonly abbreviated PhAsO3H2. This colourless solid ...
... to give diazonium salts, ArN+ 2. The resulting diazonium group is easily displaced (unlike the amino group) by a variety of ... nitrosonium compounds must be protected from water or even moist air. With base, the reaction generates nitrite: NO+ + 2 NaOH ... The ClO− 4 and BF− 4 salts are slightly soluble in CH3CN. NOBF4 can be purified by sublimation at 200-250 °C and 0.01 mmHg (1.3 ... This ion is usually obtained as the following salts: NOClO4, NOSO4H (nitrosylsulfuric acid, more descriptively written ONSO3OH ...
... is an inorganic compound with formula NO2BF4. It is a salt of nitronium cation and tetrafluoroborate anion. It is a colorless crystalline solid, which reacts with water to form the corrosive acids HF and HNO3. As such, it must be handled under water-free conditions. It is sparsely soluble in many organic solvents. Nitronium tetrafluoroborate can be prepared by adding a mixture of anhydrous hydrogen fluoride and boron trifluoride to a nitromethane solution of nitric acid or nitrogen pentoxide. Nitronium tetrafluoroborate is used as a nitration agent. Kenneth Schofield (1980). Aromatic nitration. CUP Archive. p. 88. ISBN 0-521-23362-3 ...
... is a red-violet compound formed by the condensation of diazotized sulfanilic acid with bilirubin in the van den Bergh reaction. The quantity of bilirubin in patients with jaundice can be determined by the formation of azobilirubin in the presence of methanol. http://www.mondofacto.com/facts/dictionary?azobilirubin Azobilirubin definition Gray, C. H.; Whidborne, Joanna (6 October 1945). "Studies of the Van den Bergh Reaction" (PDF). Journal of Biochemistry. 40 ...
Room temperature ionic liquids (RTILs) consist of bulky and asymmetric organic cations such as 1-alkyl-3-methylimidazolium, 1-alkylpyridinium, N-methyl-N-alkylpyrrolidinium and ammonium ions. Phosphonium cations are less common, but offer some advantageous properties.[23][24] A wide range of anions are employed, ranging from simple halides, which generally suffer high melting points, to inorganic anions such as tetrafluoroborate and hexafluorophosphate, and to large organic anions like bistriflimide, triflate or tosylate. There are also many potential uses of ionic liquids with simple non-halogenated organic anions such as formate, alkylsulfate, alkylphosphate or glycolate. The melting point of 1-butyl-3-methylimidazolium tetrafluoroborate is about −80 °C (−112 °F) and it is a colorless liquid with high viscosity at room temperature. If a highly asymmetric cation is combined with a highly asymmetric anion, formed ionic liquid may not freeze down to very low temperatures (down to −150 ...
... is a chemical reaction used to measure bilirubin levels in blood. More specifically, it determines the amount of conjugated bilirubin in the blood. The reaction produces azobilirubin. Principle: bilirubin reacts with diazotised sulphanilic acid to produce purple coloured azo bilirubin.this reaction is highly useful in understanding the nature of jaundice. This was pioneered by the Dutch Physician, Abraham Albert Hijmans van den Bergh (1869-1943) of Utrecht. http://www.jbc.org/cgi/reprint/132/1/119.pdf 1939 "BILIRUBIN AND THE VAN DEN BERGH REACTION" (PDF). Biochem Journal. Retrieved February 18, 2014 ...
Tetrakis[3,5-bis(trifluoromethyl)phenyl]borate is an anion with chemical formula [{3,5-(CF3)2C6H3}4B]−, which is commonly abbreviated as [BArF4]− as the boron atom (B) is surrounded by four fluorinated aryl (ArF) groups. It is sometimes referred to as Kobayashi's anion in honour of Hiroshi Kobayashi who led the team that first synthesised it,[1] but more commonly it is affectionately nicknamed "BARF."[2] BARF has a tetrahedral geometry around the central boron atom but each of the four surrounding aryl groups is aromatic and planar. The motivation for its preparation was the search for an anion which coordinates more weakly than the then-available ions hexafluorophosphate, tetrafluoroborate, or perchlorate.[3] Salts of this anion are known as solids and in both aqueous and non-aqueous solutions. BARF can be used in catalytic systems where the active site requires an anion which will not coordinate to the metal centre and interfere with the catalytic cycle, such as in the preparation of ...
In the liver, bilirubin is conjugated with glucuronic acid by the enzyme glucuronyltransferase, making it soluble in water: the conjugated version is the main form of bilirubin present in the "direct" bilirubin fraction. Much of it goes into the bile and thus out into the small intestine. Though most bile acid is reabsorbed in the terminal ileum to participate in enterohepatic circulation, conjugated bilirubin is not absorbed and instead passes into the colon.[9]. There, colonic bacteria deconjugate and metabolize the bilirubin into colorless urobilinogen, which can be oxidized to form urobilin and stercobilin. Urobilin is excreted by the kidneys to give urine its yellow color and stercobilin is excreted in the faeces giving stool its characteristic brown color. A trace (~1%) of the urobilinogen is reabsorbed into the enterohepatic circulation to be re-excreted in the bile.[10]. Although the terms direct and indirect bilirubin are used equivalently with conjugated and unconjugated bilirubin, ...
... may refer to: Mathematics: Tetrakis hexahedron, an Archimedean dual solid, or a Catalan solid Tetrakis square tiling, a tiling of the Euclidean plane Chemistry: Tetrakis(acetonitrile)copper(I) hexafluorophosphate, a copper(I) coordination complex with the formula [Cu(CH3CN)4]PF6 Tetrakis(dimethylamino)titanium(IV) (TDMAT) is a compound with the formula C8H24N4Ti Tetrakis(hydroxymethyl)phosphonium chloride (THPC) is a phosphonium salt with the chemical formula [(CH2OH)4P]Cl Tetrakis(triphenylphosphine)palladium(0), the chemical compound Pd[P(C6H5)3]4 Tetrakis(triphenylphosphine)platinum(0), the chemical compound with the formula Pt(P(C6H5)3) ...
黃疸(英:jaundice、icterus)又稱黃膽,俗稱黃病,是因為體內膽紅素過高,造成皮膚及鞏膜發黃或是發綠的症狀[3][6],一般會伴隨發癢[2]、糞便蒼白及尿液顏色偏深的情形[4]。新生兒黃疸是出生後前三天內出現的黃疸,大部份會自然痊癒,不會造成問題[3][6]。不過若新生兒的膽紅素非常高,或是黃疸時間太長,可能會出現稱為腦核性黃疸(英語:Kernicterus)的腦部損傷[7]。 黃疸有許多的原因,有些不嚴重,有些則可能會致命[8],正常人體血液中膽紅素的濃度會在 1.0 mg/dL(17 µmol/L),一般黃疸患者的膽紅素濃度會超過2-3 mg/dL(34-51 µmol/L)[9][4]。高膽紅素可分為兩種:非結合性膽紅素(unconjugated bilirubin)過高及結合性膽紅素(conjugated ...
... is a red-violet compound formed by the condensation of diazotized sulfanilic acid with bilirubin in the van den Bergh reaction. The quantity of bilirubin in patients with jaundice can be determined by the formation of azobilirubin in the presence of methanol. http://www.mondofacto.com/facts/dictionary?azobilirubin Azobilirubin definition Gray, C. H.; Whidborne, Joanna (6 October 1945). "Studies of the Van den Bergh Reaction" (PDF). Journal of Biochemistry. 40 ...
... is a chemical reaction used to measure bilirubin levels in blood. More specifically, it determines the amount of conjugated bilirubin in the blood. The reaction produces azobilirubin. Principle: bilirubin reacts with diazotised sulphanilic acid to produce purple coloured azo bilirubin.this reaction is highly useful in understanding the nature of jaundice. This was pioneered by the Dutch Physician, Abraham Albert Hijmans van den Bergh (1869-1943) of Utrecht. http://www.jbc.org/cgi/reprint/132/1/119.pdf 1939 "BILIRUBIN AND THE VAN DEN BERGH REACTION" (PDF). Biochem Journal. Retrieved February 18, 2014 ...
இயற்கையில் இம்மெத்தாக்சி சேர்மங்கள் அதிகமாக காணப்படாமல் இருப்பதாலேயே முக்கியத்துவம் பெறுகின்றன. அவை அமினோ அமிலங்களில் இருப்பதில்லை. இந்த வேற்றணு வளையச் சேர்மங்கள் மரபுக்குறியீட்டிலும் காணப்படவில்லை கொழுமியத்திலும் காணப்படவில்லை. இருந்தாலும் இவை O-மெத்திலேற்ற பிளவோனாய்டு எனப்படும் தாவர நிறமிகளின் பகுதிப்பொருளாக உள்ளது. இவை பீனால்கள் மீது செயல்படுகின்றன. உதாரணம்: ...
Azo compounds are compounds bearing the functional group R−N=N−R′, in which R and R′ can be either aryl or alkyl. IUPAC defines azo compounds as: "Derivatives of diazene (diimide), HN=NH, wherein both hydrogens are substituted by hydrocarbyl groups, e.g. PhN=NPh azobenzene or diphenyldiazene."[1] The more stable derivatives contain two aryl groups. The N=N group is called an azo group. The name azo comes from azote, the French name for nitrogen that is derived from the Greek ἀ- (a-, "not") + ζωή (zōē, life).. Many textile and leather articles are dyed with azo dyes and pigments.[2]. ...
... also known as azoreductase (EC 1.7.1.6) is an enzyme that catalyzes the chemical reaction: N,N-dimethyl-1,4-phenylenediamine + aniline + NADP+ ⇌ {\displaystyle \rightleftharpoons } 4-(dimethylamino)azobenzene + NADPH + H+ The 3 substrates of this enzyme are N,N-dimethyl-1,4-phenylenediamine, aniline, and nicotinamide adenine dinucleotide phosphate ion, whereas its 3 products are 4-(dimethylamino)azobenzene, nicotinamide adenine dinucleotide phosphate, and hydrogen ion. This enzyme belongs to the family of oxidoreductases, specifically those acting on other nitrogenous compounds as donors with NAD+ or NADP+ as acceptor. The reaction catalyzed by this enzyme proceeds via a ping-pong mechanism by using 2 equivalents of NAD(P)H to reduce one equivalent of the azo compound substrate (for example methyl red where Ar = p-dimethylaniline and Ar' = o-benzoic acid) into two equivalents of aniline product: Ar-N=N-Ar' + 2(NAD(P)H + H+) ⇌ {\displaystyle \rightleftharpoons } Ar-NH2 + ...
Diazonium salt, any of a class of organic compounds that have the molecular structure in which R is an atomic grouping formed ... Diazonium salts are usually prepared by the reaction (diazotization) of primary amines with nitrous acid; their most ... by removal of a hydrogen atom from an organic compound. ... Diazonium salt. chemical compound. Written By: *The Editors of ... with a mixture of a diazonium salt, a coupler that reacts with the diazonium salt to form an azo dye, and an acid that prevents ...
... an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound ... an aromatic diazonium salt containing compound having an alkoxy substituent and an aromatic diazonium salt containing compound ... The molar ratio of the aromatic diazonium salt containing compound having an alkoxy substituent to the aromatic diazonium salt ... The imaging layer includes a total aromatic diazonium salt containing compound content of at least 10 weight percent. ...
... as is the use of metals in the synthesis of aromatic compounds. Throughout, emphasis is placed on mechanisms. Worked problems ... Aromatic amines and diazonium salts. John D. Hepworth, David R. Waring and Michael J. Waring ... Aromatic halogen compounds. John D. Hepworth, David R. Waring and Michael J. Waring ... Nitro compounds. John D. Hepworth, David R. Waring and Michael J. Waring ...
The formation and reactions of diazonium ions are also discussed. This knowledge is then applied to the synthesis of ... Diazonium salts. Peter Taylor. Buy chapter Pages 68 - 74 Appendix summary of reactions useful in the synthesis of aromatic ... Compounds that mimic the action of noradrenaline-agonists. Peter Taylor. Buy chapter ... The formation and reactions of diazonium ions are also discussed. This knowledge is then applied to the synthesis of ...
... pyrylium salts; terpenes; steroids; alkaloids; amines; carbamates; ureas; azides; diazo compounds; diazonium salts; thiols; ... "Oligomer" refers to a compound that is a combination of 2 or more monomers, but that might not yet be large enough to qualify ... Examples of such compounds include styrene, alkylated styrene, alkoxy styrene, halogenated styrenes, free-radically curable ... Plasma enhanced chemical deposition with low vapor pressure compounds. US6228434. 16 Dic 1998. 8 May 2001. Battelle Memorial ...
Diazonium Salts, Cumene ... 12 - Organic Compounds Containing C, H and O 12.4 Methods of ... 12.4 Methods of Preparation: Alcohols from Alkenes and Carbonyl Compounds- Phenols from Haloarenes, Benzene Sulphonic Acid, ... 12.4 Methods of Preparation: Alcohols from Alkenes and Carbonyl Compounds- Phenols from Haloarenes, Benzene Sulphonic Acid, ... 12.4 Methods of Preparation: Alcohols from Alkenes and Carbonyl Compounds- Phenols from Haloarenes, Benzene Sulphonic Acid, ...
c. converting the nitro group to a diazonium salt, and d. coupling the diazonium salt to a compound which inhibits the ... c. converting the nitro group to a diazonium salt. and d. coupling the diazonium salt to a compound which 5O2N3 inhibits the ... 6. A process in accordance with claim 5 wherein the compound coupled to the diazonium salt is S-amino-lnaphthol-5,7-disulfonic ... 2. A process in accordance with claim 1 wherein the compound to which the diazonium salt is coupled inhibits the thrombogenic ...
This work demonstrates that diazonium compounds are unique molecular glues for conductive polymers and permit to tune their ... electrodes grafted with aryl layers from various diazonium salts, namely 4-carboxybenzenediazonium (ITO-CO2H), 4- ... With robust, diazonium-based architectured interfaces, one can design high performance materials for e.g., sensors, printed ... Keywords: polypyrrole; diazonium salts; flexible ITO; adhesion; redox properties polypyrrole; diazonium salts; flexible ITO; ...
Aryl radicals can be obtained via aryl diazonium salts. Alternatives for these salts are certain aryl triazenes and aryl ... The parent compound is the phenyl radical C6H5.. Aryl radicals are intermediates in certain organic reactions. ... An Aryl radical in organic chemistry is a reactive intermediate and an arene compound incorporating one free radical carbon ... Aryl bromides and iodides can be converted to aryl radicals via tributyltin hydride and related compounds and silyl hydrides. ...
... which occurs in a series of aromatic compoundsOrigin of diazonium diaz(o)- + (amm)onium... ... diazonium definition: designating or containing the organic radical N?N, ... Nitro compounds have also been prepared by the action of cuprous oxide on diazonium salts (T. ... plural diazoniums). *(chemistry) any univalent cation, of general formula R-N2+; diazonium salts are used to manufacture azo ...
New, in that the first artificial synthesis of an organic compound didnt occur until 1828. Old, ... Diazonium salts allow you to make many different derivatives of aromatic compounds. These derivatives include some important ... Diazonium Salts. To make a diazonium salt, you need an aromatic amine, sodium nitrite, and a hydrogen halide. ... You may know that a compound of class A reacts with a compound of class B. But depending on the specific compounds involved, ...
Diazonium salt.. INCOMPATIBILITY. Heating produces toxic fumes of chlorine and nitrogen compounds.. HEALTH HAZARD DATA. This ... Red TR, fast red 5CT, fast red TRN, fast red salt TR, red TA, red TRS, red IX.. CHARACTERISTICS. Dark red powder. ...
Aromatic iodides may be prepared via a diazonium salt in the Sandmeyer reaction. Because of its low ionization energy, iodine ... Organofluorine compounds Organochlorine compounds Organobromine compounds Iodanes Periodinanes Alex G. Fallis, Pierre E. ... Organoiodine compounds are organic compounds that contain one or more carbon-iodine bonds. They occur widely in organic ... More than 3000 organoiodine compounds have been identified. Organoiodine compounds are prepared by numerous routes, depending ...
The diazonium salt thus formed was added gradually to the solution of the compound A which had been continuously stirred. In ... coumarin-based compounds, biphenyl-based compounds, benzoxazolyl-based compounds, naphthalimide-based compounds, pyrazoline- ... Examples of the antioxidant include chroman-based compounds, coumarin-based compounds, phenol-based compounds (e.g., hindered ... wherein the dye-donating compound is a compound which can reduce a silver halide or an organic silver salt and releases a ...
Functional Groups, Heterocyclic Compounds and Natural Products is a course offered at the School of Arts and Sciences, Amrita ... Synthetic transformations by aryl diazonium salts, azo coupling.. Unit IV: Heterocyclic Compounds. Introduction, methods of ... Unit III: Organic Compounds of Nitrogen. Nitro Compounds: Introduction, Preparation of nitroalkanes and nitroarenes. Chemical ... To develop an understanding of Natural Products,Alcohols and Phenols, Carbonyl Compounds, Organic Compounds of Nitrogen and ...
... an undercoating layer comprising at least one compound having at least one functional group selected fr ... wherein the diazonium compound is a condensate of an aromatic diazonium salt and a reactive carbonyl-containing compound. 10. A ... Recently, most of photosensitive lithographic plates using diazonium compounds comprise diazonium compounds and polymer binders ... If necessary, two or more diazonium compounds may be used in combination. (b) High molecular weight binder compound insoluble ...
Contiguous N atoms (azides, aliphatic azo compounds, diazonium salts, hydrazines. Not present ... 6-[(p-tosyl)amino]hexanoic acid, compound with 2,2,2-nitrilotriethanol (1:1). ...
It reacts with nitrous acid to form diazonium salt, which can undergo coupling reaction to form an azo compound. As azo- ... carboxylate salt. →. d. e. h. y. d. r. a. t. i. o. n. h. e. a. t. N. ,. R. 2. R. 1. ,. −. C. O. ‖. −. R. 3. ⏟. a. m. i. d. e. + ... Amines react with nitrous acid to give diazonium salts. The alkyl diazonium salts are of little synthetic importance because ... Diazonium salt Reagent: nitrous acid Zincke reaction Zincke aldehyde Reagent: pyridinium salts, with primary and secondary ...
Since diazonium salts are often unstable near room temperature, the azo coupling reactions are typically conducted near ice ... Some azo compounds, e.g., methyl orange, are used as acid-base indicators due to the different colors of their acid and salt ... Azo compounds are compounds bearing the functional group R−N=N−R′, in which R and R′ can be either aryl or alkyl. IUPAC defines ... Alkyl azo compounds[edit]. Aliphatic azo compounds (R and/or R′ = aliphatic) are less commonly encountered than the aryl azo ...
G03F7/016-Diazonium salts or compounds * G03F7/021-Macromolecular diazonium compounds; Macromolecular additives, e.g. binders ... B41N3/038-Treatment with a chromium compound, a silicon compound, a phophorus compound or a compound of a metal of group IVB; ... G03F7/0212-Macromolecular diazonium compounds; Macromolecular additives, e.g. binders characterised by the polymeric binder or ... the macromolecular additives other than the diazo resins or the polymeric diazonium compounds ...
This has been extensively used to develop microbial production systems for a variety of compounds valuable in chemical industry ... This has been extensively used to develop microbial production systems for a variety of compounds valuable in chemical industry ... Farlow, A., and Krömer, J. O. (2016). Reactions with aminobenzoic acids via diazonium salts open new routes to bio-derived ... Scopolamine, the main compound of interest, is an important bulk compound in the semi-synthesis of drugs like Buscopan® and ...
All newly synthesized compounds were elucidated by considering the data of both elemental and spectral analysis. The compounds ... Reaction of 3 with phenyl isothiocyanate and KOH in DMF afforded the intermediate salt 17 which reacted in situ with 3-(2- ... Diazotization of 3 with the desired diazonium chloride gave the hydrazone derivatives 13a-e. Also, the reactivity of the ... This study aimed for the synthesis of new heterocyclic compounds incorporating sulfamoyl moiety suitable for use as ...
Y is the radical derived by removing m-p hydrogen atoms from the hydroxyl groups of an organic compound containing m OH groups ... Compounds with multiple acrylic radicals, the average composition of which has the general formula: X--y--(z)m --p --1 ]n ... such as diazonium salts, azoxybenzenes and derivatives, rhodamines, eosines, fluoresceines, acriflavine or the like. ... Among these compounds (a), (b), (c), the compounds selected will be those which have a good compatibility with the compounds ...
Diazotization: Forming a diazonium salt from an appropriate primary aromatic amine in the presence of HNO2. ... This compound is prepared according to the Fisher indole synthesis starting from phenylhydrazine and cyclohexanone. ...
1981,17 83-93). Photocuring of polyurethane precursors using diazonium salts, tertiary amine precursors, or organotin compounds ... Vinyl compounds, allyl compounds, and allyl ether compounds are other types of ethylenically-unsaturated compounds useful in ... Use of an organometallic salt or diazonium salt with a free-radical photoinitiator which can be a peroxide to sequentially cure ... By "accessible", it is meant that the compound (or precursor compound from which the accessible compound is prepared) bearing ...
  • 1901, 34, p. 3337) has shown that in the action of alcohols on diazonium salts an increase in the molecular weight of the alcohol and an accumulation of negative groups in the aromatic nucleus lead to a diminution in the yield of the ether produced and to the production of a secondary reaction, resulting in the formation of a certain amount of an aromatic hydrocarbon. (yourdictionary.com)
  • Dotz, Highly Regio-and Diastereoselective Chromium(0) -Catalysed Cyclopropanation of 1-Alkoxy-1,3-dienes with Diazo Compounds , Eur. (thefreedictionary.com)
  • His work revolves around the chemistry of oxadiazolines, which he has shown to be exceedingly versatile precursors of carbenes (upon thermolysis) or diazo compounds (upon photolysis). (thefreedictionary.com)
  • In particular, this invention pertains to the method of improving sensitivity in laser induced thermal imaging using diazo compounds. (patent-de.com)
  • WO 97/6168 forms prior art under Art 54(3) (4) EPC and discloses the use of bis-diazo compounds in the synthesis of diaza bicyclo compounds. (patent-de.com)
  • In accordance with the present invention, the sensitivity of laser induced thermal imaging systems can be increased by using diazo compounds that contain at least one electron withdrawing functional group adjacent the diazo substituent capable of stabilizing the diazo substituent (i.e., the =N + =N - substituent). (patent-de.com)
  • If a compound has both single and double bonds (not necessarily carbon-carbon) in the right arrangement, electron delocalization can occur, which stabilizes the molecule. (grantvillegazette.com)
  • Due to the fact that most sesquiterpene lactones are thermolabile, less volatile compounds, they present no specific chromophores in the molecule and are sensitive to acidic and basic mediums, and their identification and quantification represent a difficult task for the analyst. (hindawi.com)
  • Shortened С-N bonds (1.351 Å) in the molecule of pyrazole-4-diazonium salts point to the strong conjugation of diazonium group with the heteroaromatic ring. (springer.com)
  • Cyclic compounds are often formed by intramolecular reactions , meaning reactions in which different parts of the same molecule react with each other. (wikibooks.org)
  • The absorption of visible light energy by the compound promotes electrons in the molecule from a low energy state, the ground state , to a higher energy state, the excited state . (essentialchemicalindustry.org)
  • The present invention provides a compound and a pigment dispersant, each of which improves the dispersibility of various types of pigments in a non-aqueous solvent and also provides a pigment composition, a pigment dispersion, and a toner, each of which has a preferable coloring power. (patents.com)
  • All newly synthesized compounds were elucidated by considering the data of both elemental and spectral analysis. (mdpi.com)
  • Results from assessment of the antimicrobial activity of these newly synthesized compounds are reported in this study. (hindawi.com)
  • The law that a given chemical compound always contains the same elements in the same fixed proportions by weight. (accessscience.com)