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Papua New Guinea
A country consisting of the eastern half of the island of New Guinea and adjacent islands, including New Britain, New Ireland, the Admiralty Islands, and New Hanover in the Bismarck Archipelago; Bougainville and Buka in the northern Solomon Islands; the D'Entrecasteaux and Trobriand Islands; Woodlark (Murua) Island; and the Louisiade Archipelago. It became independent on September 16, 1975. Formerly, the southern part was the Australian Territory of Papua, and the northern part was the UN Trust Territory of New Guinea, administered by Australia. They were administratively merged in 1949 and named Papua and New Guinea, and renamed Papua New Guinea in 1971.
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Peptide-N4-(N-acetyl-beta-glucosaminyl) Asparagine Amidase
Mammalian nitric oxide synthases. (1/130)
The nitric oxide (NO) synthase family of enzymes generate NO from L-arginine, which acts as a biologic effector molecule in a broad number of settings. This report summarizes some of the current information regarding NO synthase structure-function, reaction mechanism, control of catalysis, and protein interactions. (+info)[3H]diborane reduction of vitamin K-dependent calcium-binding proteins. Identification of a unique amino acid. (2/130)
gamma-Carboxyglutamic acid has recently been identified as a component of the vitamin K-dependent region of bovine prothrombin (Nelsestuen, G. L., Zytkovicz, T. H., and Howard J. B. (1974) J. Biol Chem. 249, 6347-6350). The presence of this amino acid has been substantiated here by the reduction of vitamin K-dependent proteins with [3H]-DIBORANE. The reduction product of gamma-carboxyglutamic acid, 5,5'-[3H]dihydroxyleucine, was shown to be present in hydrolysates of reduced rat prothrombin, bovine prothrombin, and bovine factor X. The results are consistent with a minimum of 10 gamma-carboxyglutamic acid residues in the nonthrombin-generating region of bovine prothrombin but no such residues in the thrombin precursor portion of prothrombin. It is concluded that amino acid analyses of [3H]diborane-reduced proteins provides a sensitive, qualitative method for the identification of proteins which contain gamma-carboxyglutamic acid and are vitamin K-dependent. (+info)Alpha-glucosidase inhibitors with a 4,5,6,7-tetrachlorophthalimide skeleton pendanted with a cycloalkyl or dicarba-closo-dodecaborane group. (3/130)
Previous studies of alpha-glucosidase inhibitors derived from thalidomide revealed that 4,5,6,7-tetrachloro-N-alkylphthalimide derivatives are superior lead compounds. Structure-activity relationship studies indicated that a hydrophobic group at the N(2) position is mandatory for potent activity. Accordingly, we have designed and synthesized some 4,5,6,7-tetrachloro-N-cycloalkylphthalimide and 4,5,6,7-tetrachloro-N-dicarba-closo-dodecaborane derivatives. The prepared compounds exhibited potent alpha-glucosidase-inhibitory activity. Among them, 4,5,6,7-tetrachloro-N-cycloheptylphthalimide (9) showed the most potent activity, being approximately 30 times more active than the classical inhibitor, 1-deoxynojirimycin (1). (+info)A synthesis of 3-phenyl-1,2,3,4-tetrahydroisoquinoline and 2-phenyl-1,2,4,5-tetrahydro-3H-3-benzazepine via Pummerer-type cyclization: enhancing effect of boron trifluoride diethyl etherate on the cyclization. (4/130)
A synthesis of 6,7-dimethoxy-3-phenyl-1,2,3,4-tetrahydroisoquinoline (14a) and 7,8-dimethoxy-2-phenyl-1,2,4,5-tetrahydro-3H-3-benzazepine (14b) was achieved via the cyclization of N-(3,4-dimethoxyphenyl)methyl-1-phenyl-2-(phenylsulfinyl)ethylformamide (6a) and N-2-(3,4-dimethoxyphenyl)ethyl-1-phenyl-2-(phenylsulfinyl)-ethylformamide (6b) using the Pummerer reaction as a key step, respectively. The Pummerer reaction of 6a,b under usual conditions using trifluoroacetic anhydride yielded the vinyl sulfides (8a, b), non-cyclized products, as a major product. The cyclization proceeded when boron trifluoride diethyl etherate was used as an additive reagent, thus giving rise to the corresponding cyclized products (7a) and (7b) in moderate yields. We propose that the enhancing effect of the Lewis acid on the cyclization may be attributable to the involvement of a dicationic intermediate, sulfonium-carbenium dication (23). (+info)In vitro antimycobacterial activities of 2'-monosubstituted isonicotinohydrazides and their cyanoborane adducts. (5/130)
As a result of our search for new isoniazid derivatives with extended spectra of activity, we evaluated the in vitro antimycobacterial activities of isonicotinohydrazides (compounds 2) and their cyanoborane adducts (compounds 3), both obtained by the reaction of isonicotinoylhydrazones (compounds 1) with sodium cyanoborohydride. Most of the tested compounds displayed moderate to high activity against Mycobacterium tuberculosis H37Rv, with MICs ranging from 0.2 to 12.5 microg/ml. In particular, some hydrazides showed activity similar to that of rifampin (MIC = 0.2 microg/ml) and rather low cytotoxicity, so that they were generally shown to possess high safety indices. In contrast, the coordination to a cyanoborane (BH(2)CN) group (compounds 3) in general brought about a decrease in antimycobacterial activity, while cytotoxicity increased. Interestingly, selected compounds 1 to 3, mostly hydrazides (compounds 2), were effective in killing M. tuberculosis growing within macrophages at concentrations in culture medium which were much lower than the corresponding MICs. These compounds also displayed good activity against drug-resistant M. tuberculosis strains. (+info)Convection-enhanced delivery of boronated epidermal growth factor for molecular targeting of EGF receptor-positive gliomas. (6/130)
Convection enhanced delivery (CED) is potentially a powerful method to improvethe targeting of macromolecules to the central nervous system by applying a pressure gradient to establish bulk flow through the brain interstitium during infusion. The purpose of the present study was to evaluate CED as a means to improve the intracerebral and intratumoral (i.t.) uptake of a heavily boronated macromolecule (dendrimer; BD) linked to epidermal growth factor (EGF) for neutron capture therapy in rats bearing a syngeneic epidermal growth factor receptor (EGFR) + glioma. Boronated EGF was radiolabeled with 125I and administered by CED at a rate of 0.33 micro l/min for 15, 30, and 60 min [infusion volumes (V(I)) of 5, 10, and 20 micro l, respectively], using a syringe pump connected to an indwelling cannula implanted into the right caudate nucleus of normal rats or i.t. in rats bearing either F98(EGFR) or F98 wild-type (F98(WT)) gliomas. After infusion, rats were euthanized, and their brains were removed and serially sectioned. The uptake and biodistribution of (125)I-boronated EGF in tumor or brain was studied by quantitative autoradiography and gamma-scintillation counting. The volume of distribution (V(d)) in brain was assessed using a computer interfaced image analysis system. After CED, the V(d) increased from 34.4 to 123.5 micro l with corresponding V(i) ranging from 5 to 20 micro l. The V(d) of BD-EGF in the brain was 64.8 +/- 13.4 micro l with CED (V(i) 10 micro ), and the V(d):V(i) ratio was 6.5 compared with a V(d) of 9.4 +/- 1.6 micro l and a V(d):V(i) ratio of 0.9 after direct intracerebral injection. As determined by quantitative autoradiography and gamma-scintillation counting at 24 h after CED, 47.4% of the injected dose per gram tissue (%ID/g) was localized in F98(EGFR) gliomas compared with 33.2%ID/g after direct i.t. injection and 12.3%ID/g in F98(WT) gliomas. On the basis of these observations, we have concluded that CED is more effective than i.t. injection as a way to deliver boronated EGF to EGFR (+) gliomas for boron neutron capture therapy. (+info)Asymmetric borane reduction of prochiral ketone using chiral bis(alpha, alpha-diphenyl-2-pyrrolidinemethanol) carbonate. (7/130)
Chiral bis(alpha, alpha-diphenyl-2-pyrrolidinemethanol) carbonate (DPP(2).H(2)CO(3)) is a useful asymmetric auxiliary for the asymmetric borane reduction of prochiral ketones. Chiral DPP(2).H(2)CO(3) is recoverable from the reaction and directly reusable for the reaction. The intermediate of KUR-1246, which we are developing as a new uterine relaxant, was synthesized using the methodology. (+info)Diastereoselective solid-phase radical addition to oxime ether anchored to polymer support. (8/130)
Stereocontrol in radical reactions of oxime ether anchored to polymer support was studied. Highly diastereoselective solid-phase radical reaction was achieved by using triethylborane and diethylzinc as a radical initiator at low reaction temperature, providing a novel method for the synthesis of the alpha-amino acid derivatives with excellent diastereoselectivities. (+info)
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Hexafluoroarsenate.
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Plus it
Temporal inhibition of mouse mammary gland cancer metastasis by CORM-A1 and DETA/NO combination therapy [Abstract]
Susceptibility to hydrolysis of phenylboronic pinacol esters at physiological pH
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Highly Enantioselective Catalytic Allylboration of Ketiminoesters: Practical and Scalable Synthesis of α-Fully-Substituted...
Hydroboration-oxidation reaction
In order to prevent hydroboration across both the pi-bonds, a bulky borane like disiamyl (di-sec-iso-amyl) borane is used. Use ... In the first step, borane (BH3) adds to the double bond, transferring one of the hydrogen atoms to the carbon adjacent to the ... Alkyl migration to oxygen gives the alkyl borane with retention of stereochemistry (in reality, the reaction occurs via the ... Hawthorne, M. F. (1961). "Amine Boranes. VIII. The Hydroboration of Terminal Olefins, Dienes and Terminal Acetylenes with ...
Octadecaborane
Among the geometric isomers, one with chirality was the first borane to be resolved into its separate enantiomers, and was only ... Octadecaborane is an inorganic compound, a borane with chemical formula B18H22. It is a colorless flammable solid, like many ... Heřmánek, S.; Plešek, J. (1970). "Chemistry of boranes. XXI. Resolution of iso-octadecaborane to optical enantiomers". ... This compound was the first borane found to have multiple isomeric forms. ...
Methyldiborane
This will strip off borane to combine with the Lewis base, and let two methyl borane molecules dimerise. Methyldiborane can ... and can be imagined as methyl borane (CH3BH2) bound to borane (BH3). Other combinations of methylation occur on diborane, ... As with other boranes it exists in the form of a dimer with a twin hydrogen bridge that uses three-center two-electron bonding ... A gas chromatograph can be used to determine the amounts of the methyl boranes in a mixture. The order they pass through are ...
9-Borabicyclo(3.3.1)nonane
The steric demand of 9-BBN greatly suppresses the formation of the 2-substituted isomer compared to the use of borane. Brown, H ... 9-BBN is also known by its nickname 'banana borane'. This is because rather than drawing out the full structure, chemists often ... 5-cyclooctadiene and borane usually in ethereal solvents, for example: The compound is commercially available as a solution in ... C. (1975). Organic Syntheses via Boranes. New York: John Wiley & Sons. ISBN 0-471-11280-1. Stix, Gary. "The Straight Dope: A Q& ...
Hydride
Brown, H. C. (1975). Organic Syntheses via Boranes. New York: John Wiley & Sons. ISBN 0-471-11280-1. Palladium hydride Züttel, ... borane, BH3 aluminium: alumane, AlH3 gallium: gallane, GaH3 indium: indigane, InH3 thallium: thallane, TlH3 carbon: alkanes, ... also borane, pentaborane and decaborane arsine: used for doping semiconductors stibine: used in semiconductor industry ...
1,2-Dimethyldiborane
More methylated boranes are less stable. 1,2-Dimethyldiborane slowly converts to 1,1-dimethyldiborane. Methylborane hydrolyzes ... CS1 maint: discouraged parameter (link) Isadore Shapiro; C. O. Wilson; J. F. Ditter; W. J. Lehmann (1961). Borax to Boranes ( ... By treating monomethyldiborane with ether, dimethyl ether borane (CH3)2O.BH3 leaving methylborane which rapidly dimerises to 1, ... by Borane: the Intimate Mechanism of an Alkyl Transfer Reaction". Journal of the American Chemical Society. 104 (9): 2361-2365 ...
Hydroboration
Borane adducts with phosphines and amines are also available, but are not widely used. Borane makes a strong adduct with ... This significant rate difference in producing di- and tri-alkyl boranes is useful in the synthesis of bulky boranes that can ... See Borane-dimethylsulfide complex Zaidlewicz, Marek; Baum, Ofir; Srebnik, Morris. "Borane Dimethyl Sulfide". Encyclopedia of ... More sterically hindered tertiary and silyl amines can deliver borane to alkenes at room temperature. Monoalkyl boranes are ...
E. D. Jemmis
The latter involved an extension of the Wade's Rules for polyhedral boranes to macropolyhedral boranes and the Huckel 4n+2 Rule ... The Jemmis mno rules for polyhedral boranes have found a place in textbooks and are being taught in Inorganic Chemistry Courses ... Shameema, O.; Jemmis E. D. (2008). "Orbital Compatibility in the Condensation of Polyhedral Boranes". Angew. Chem. Int. Ed. 47 ... Jemmis, E. D.; Balakrishnarajan M. M. (2001). "Polyhedral Boranes and Elemental Boron: Direct Structural Relations and Diverse ...
Polyhedral skeletal electron pair theory
... the higher boranes and borane anions, and various transition-metal carbonyl cluster compounds". J. Chem. Soc. D. 1971: 792-793 ... as is the case for many boranes and carboranes. For such clusters, the structures are based on deltahedra, which are polyhedra ... provides electron counting rules useful for predicting the structures of clusters such as borane and carborane clusters. The ... A Graph-Theoretical Interpretation of the Bonding Topology in Polyhedral Boranes, Carboranes, and Metal Clusters". J. Am. Chem ...
William Lipscomb
The Boranes and Their Relatives. in Les Prix Nobel en 1976. Imprimerie Royal PA Norstedt & Soner, Stockholm. 110-131.[1][2] ... The 1976 Nobel Prize in Chemistry was awarded to Lipscomb "for his studies on the structure of boranes illuminating problems of ... The diagram at right shows a typical nuclear magnetic resonance (NMR) spectrum of a borane molecule. Lipscomb investigated ... Lipscomb and his graduate students further determined the molecular structure of boranes (compounds of boron and hydrogen) ...
Heteroborane
... s are classes of boranes, at least one boron atom is replaced by another element. Like many of the related boranes ... Carborane Azaborane "Polyhedral Boranes" (PDF). Mit. Retrieved 22 December 2016. CS1 maint: discouraged parameter (link). ...
Jemmis mno rules
The Jemmis mno rule provides the relationship between polyhedral boranes, condensed polyhedral boranes, and β-rhombohedral ... the higher boranes and borane anions, and various transition-metal carbonyl cluster compounds". J. Chem. Soc. D (15): 792. doi: ... The Jemmis mno rules are an extension of Wade's rules, generalized to include condensed polyhedral boranes as well. The first ... They were formulated by Eluvathingal Devassy Jemmis to explain the structures of condensed polyhedral boranes such as B 20H 16 ...
Dodecaborate
Miller, H. C.; Muetterties, E. L.; Boone, J. L.; Garrett, P.; Hawthorne, M. F. (2007). "Borane Anions". Inorganic Syntheses. pp ...
Spherical aromaticity
Fullerene chemistry Carborane Boranes Hirsch, Andreas; Chen, Zhongfang; Jiao, Haijun (2000), "Spherical Aromaticity in Ih ... Spherical Aromaticity: Recent Work on Fullerenes, Polyhedral Boranes, and Related Structures. ... polyhedral boranes. In 2000, Andreas Hirsch and coworkers in Erlangen, Germany, formulated a rule to determine when a fullerene ...
Earl Muetterties
Muetterties's work on boron hydride clusters led to the work on several polyhedral borane anions such as B12H122−. He was an ... In addition to the polyhedral boranes, the program explored pi-allyl, fluoroalkyl, and boron hydride complexes of the ... Journal of the American Chemical Society (1957), 79 3686-7. Hawthorne, M. Frederick (March 23, 2009). "Polyhedral Boranes: ... who is known for his experimental work with boranes, homogeneous catalysis, heterogeneous catalysis, fluxional processes in ...
Phosphinimide ligands
Holthausen, Michael H.; Mallov, Ian; Stephan, Douglas W. (2014). "Phosphinimine-substituted boranes and borenium ions". Dalton ...
Swern oxidation
Atkins, Jr., William J.; Burkhardt, Elizabeth R.; Matos, Karl (2006). "Safe Handling of Boranes at Scale". Org. Process Res. ...
Pinacolborane
... is the borane with the formula (CH3)4C2O2BH. It features a five-membered C2O2B ring. Owing to the presence of the ... Brown, H.C.; Zaidlewicz, M. (2001). Organic Syntheses Via Boranes, Vol. 2. Milwaukee, WI: Aldrich Chemical Co. ISBN 978-0- ...
Parent hydride
Borane dimerizes irreversibly. Gallane and heavier congeners polymerize, sometimes with loss of hydrogen. Plumbane and ...
Sodium triethylborohydride
"Callery Borane Products , Callery.com , Callery". Callery. 2017-03-05. Retrieved 2017-03-05. Binger, P.; Köster, R., "Sodium ...
Boroxine
... borane → LiBH 4 ( CH 3 BO ) 3 {\displaystyle {\ce {3CO}}+1.5\ \overbrace {{\ce {B2H6}}} ^{{\ce {borane}}}\ {\ce {->[{\ce {LiBH4 ... Brown, H.C. Boranes in Organoc Chemistry; Cornell University Press: Ithaca, 1972; pp. 346-347. Hall, Dennis G. (2005). Boronic ... A more recent synthesis of trimethylboroxine involves the reaction of carbon monoxide with borane (B2H6) and lithium ...
ane
... the hydrides of boron are boranes B2H6. The final "-e" is dropped before a suffix that starts with a vowel, e.g. "propanol". ...
Borylation
They found out that the chiral amino alcohols would react with borane to form aloxyl-amine-borane complexes. The complexes are ... under the name Alpine Borane and the asymmetric reduction of carbonyl groups with either enantiomer of Alpine-Borane is known ... Organoboron chemistry Reactions of organoborates and boranes Corey-Itsuno reduction Midland Alpine borane reduction Petasis ... In 1987, E. J. Corey and co-workers found out that the formation of oxazaborolidines from borane and chiral amino alcohols. And ...
Hydride
Brown, H. C. (1975). Organic Syntheses via Boranes. New York: John Wiley & Sons. ISBN 0-471-11280-1.. ... diborane: reducing agent, rocket fuel, semiconductor dopant, catalyst, used in organic synthesis; also borane, pentaborane and ...
Hexaborane(12)
It is an obscure member of the boranes. It is a colorless liquid that, like most boron hydrides, is readily hydrolyzed and ...
Electron deficiency
More generally, nearly all carboranes, boranes, and other known and characterized polyboron clusters are similarly electron- ... Lipscomb, William N. (11 December 1976). "The Boranes and their relatives (Nobel lecture)" (PDF). nobelprize.org. Nobel ...
Organoboron chemistry
NHCs and boranes form stable NHC borane adducts. Triethylborane adducts can be synthesised directly from the imidazolium salt ... Hydroboration of alkenes or alkynes is an efficient method for the generation of boranes; however, the use of borane (BH3) or ... Hydroboration of alkenes or alkynes with borane (BH3) or borane equivalents leads to the conversion of only 33% of the starting ... Two of the three alkyl groups attached to the borane may be converted to halide in the presence of excess base, but the use of ...
Diborane
These adducts include borane-tetrahydrofuran (borane-THF) and borane-dimethylsulfide. The toxic effects of diborane are ... It reacts with ammonia to form the diammoniate of diborane, DADB, with lesser quantities of ammonia borane, depending on the ... The 1976 Nobel Prize in Chemistry was awarded to Lipscomb "for his studies on the structure of boranes illuminating problems of ... further confirmed the molecular structure of boranes using X-ray crystallography in the 1950s and developed theories to explain ...
Diphosphorus tetrafluoride
The Synthesis of Tetrafluorodiphosphine Borane". Journal of the American Chemical Society. 89 (1): 172-173. doi:10.1021/ ...
Inorganic polymer
H. C. Johnson; T. N. Hooper; A. S. Weller (2015). "The Catalytic Dehydrocoupling of Amine-Boranes and Phosphine-Boranes". Top. ... This type of reaction is illustrated by the stepwise conversion of ammonia borane to discrete rings and oligomers, which upon ...
Borane | Define Borane at Dictionary.com
Borane, chlorothioxo
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Borane - Wikipedia
Borane(5)Edit. Borane(5) is the dihydrogen complex of borane. Its molecular formula is BH5 or possibly BH3(η2-H2).[12] It is ... For the class of compounds, see boranes.. Trihydridoboron, also known as borane or borine, is an unstable and highly reactive ... Borane dimethylsulfide which is more stable than borane-tetrahydrofuran may also be used.[11][10] ... The preparation of borane carbonyl, BH3(CO), played an important role in exploring the chemistry of boranes, as it indicated ...
sodium oxidooxy-oxo-borane hydrate
... borane hydrate
S-Alpine-Borane® 97% | Sigma-Aldrich
S-Alpine-Borane® 97%; CAS Number: 42371-63-1; Synonym: B-Isopinocampheyl-9-borabicyclo[3.3.1]nonane; Linear Formula: C18H31B; ... S-Alpine-Borane® 97% Synonym: B-. Isopinocampheyl-. 9-. borabicyclo[3.3.1]. nonane ... S-Alpine-Borane® may be used in the preparation of (-)-(4S)-5-methyl-2-hexyn-4-ol, an intermediate for the synthesis of (+)- ... S-Alpine-Borane® is a chiral reducing agent, synthesized from (-)-α-pinene via hydroboration. ...
Tris(pentafluorophenyl)borane - Wikipedia
Tris(pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C6F5)3B. It is a white, volatile solid ... Tris(pentafluorophenyl)borane is also capable of abstracting hydride to give [(C6F5)3BH]−, and it catalyzes hydrosilylation of ... Tris(pentafluorophenyl)borane is prepared using a Grignard reagent derived from bromopentafluorobenzene: 3 C6F5MgBr + BCl3 → (C ... Tris(pentafluorophenyl)borane is a key reagent leading to the concept of frustrated Lewis pairs. The combination of BCF and ...
Crystals | Free Full-Text | In situ Synchrotron X-ray Thermodiffraction of Boranes
The selected boranes are ammonia borane NH3BH3 (AB), hydrazine borane N2H4BH3 (HB), hydrazine bisborane N2H4(BH3)2 (HBB), ... H interactions with four to five borane anions. The main results are presented and discussed herein. ... Boranes of low molecular weight are crystalline materials that have been much investigated over the past decade in the field of ... The selected boranes are ammonia borane NH3BH3 (AB), hydrazine borane N2H4BH3 (HB), hydrazine bisborane N2H4(BH3)2 (HBB), ...
Triethylamine--borane - Substance Information - ECHA
Tetrahydrofuran--borane - Registration Dossier - ECHA
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
Skip to Properties
Borane Ammonia Complex H3N-BH3 bulk & research qty manufacturer. Properties, SDS, Applications, Price. Free samples program. ... Borane Ammonia Complex Synonyms. Ammonia borane; Amminetrihydroboron; Borazane; azane, borane; borane amine; borane ammonia; ... Borane ammonia complex. CAS-No. 13774-81-7. Revision Date. New Jersey Right To Know. Components. Borane ammonia complex. CAS-No ... About Borane Ammonia Complex. Borane Ammonia Complex is generally immediately available in most volumes. American Elements ...
[current-page:url] Properties
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Palladium catalyzed carboxylation of allylstannanes and boranes using CO2 - Chemical Communications (RSC Publishing)
2-aminoethoxy)(diphenyl)borane - Substance Information - ECHA
Chemical Database: Borane, trifluoro-, dihydrate (EnvironmentalChemistry.com)
This page contains information on the chemical Borane, trifluoro-, dihydrate including: 5 synonyms/identifiers; U.S. Code of ... Borane, trifluoro-, dihydrate. Identifications. *CAS Number: 13319-75-0*Synonyms/Related:*Borane, trifluoro-, dihydrate*Boron ... Borane, trifluoro-, dihydrate (EnvironmentalChemistry.com),/a,- This page contains information on the chemical Borane, ... Chemical Database - Borane, trifluoro-, dihydrate. EnvironmentalChemistry.com. 1995 - 2018. Accessed on-line: 4/19/2018. https ...
Ionic liquid solubilized boranes as hypergolic fluids - Journal of Materials Chemistry (RSC Publishing)
When dissolved in ionic liquids, the borane solutions exhibit ignition delay times which are superior to any known hypergolic ... These borane-ionic liquid solutions appear to be the bri ... Borane compounds which are hydrogen storage materials are ... borane. solutions exhibit ignition delay times which are superior to any known hypergolic ionic liquids. . These borane. - ... boranes. as hypergolic fluids H. Gao and J. M. Shreeve, J. Mater. Chem., 2012, 22, 11022 DOI: 10.1039/C2JM31627G ...
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APS -APS March Meeting 2010
- Event - Hydrogen clathrates of ammonia borane
We predicted stability of hydrogen clathrates of ammonia borane at ambient pressure and T=77~K. Further stabilization by ... The concept of hierarchical hydrogen storage is illustrated by clathrates built from ammonia borane (AB) and loaded with ... Abstract: D30.00013 : Hydrogen clathrates of ammonia borane. 5:18 PM-5:30 PM. ...
British Library EThOS: Borane complexes as novel reducing agents
The use of borane-pyridine as a reducing agent for the reductive amination of aldehydes and ketones with primary aromatic and ... Results were encouraging, suggesting that borane-pyridine in acidic media could be developed into a useful practical reagent ... The hydroboration of alkenes with borane complexed to hindered tertiary amines was studied. Complexes capable of hydroboration ... The successful hydroboration of simple alkenes with borane-triphenylphospbite was achieved in refluxing ethereall solvents in ...
Boranes | Article about Boranes by The Free Dictionary
Boranes containing two to 20 atoms of boron per molecule are known. The simplest borane, BH3, does not exist in a free... ... Find out information about Boranes. compounds of boron and hydrogen. ... Boranes. Also found in: Dictionary. Boranes. compounds of boron and hydrogen. Boranes containing two to 20 atoms of boron per ... The lower boranes are gases (B2H6 and B4H10-tetraborane) and liquids (B5H9-pentaborane); the higher boranes (BioHn-decabo-rane ...
Electrochemistry and Photoluminescence of Icosahedral Carboranes, Boranes, Metallacarboranes, and Their Derivatives
Icosahedral boranes, carboranes, and metallacarboranes are extraordinarily robust compounds with desirable properties such as ... Electrochemistry and Photoluminescence of Icosahedral Carboranes, Boranes, Metallacarboranes, and Their Derivatives. Scientific ... Electrochemistry and Photoluminescence of Icosahedral Carboranes, Boranes, Metallacarboranes, and Their Derivatives Written by ... there is a need for a review dedicated to the redox and photophysical characteristics of easily accessible borane and carborane ...
PNNL: Hydrogen Storage in Ammonia Borane
Ammonia borane, is a solid at room temperature composed of 19 weight percent hydrogen. Unfortunately, the bulk ammonia borane ... Hydrogen Storage in Ammonia Borane Ammonia borane releases a hydrogen molecule, forming polyaminoborane. Release of a second ... They have observed when ammonia borane is put into the pores of a mesoporous silica, with a pore diameter of 6.5 nanometer, the ... A team of PNNL researchers have been evaluating ammonia borane, the inorganic analog of ethane, as a potential hydrogen storage ...
Crystals | Free Full-Text | Synthesis and Reactivity of Novel Boranes Derived from Bulky Salicylaldimines: The Molecular...
Keywords: adamantylamine; adduct; borane; hydroboration; maltol adamantylamine; adduct; borane; hydroboration; maltol ►▼ ... Bourque, J.L.; Geier, S.J.; Vogels, C.M.; Decken, A.; Westcott, S.A. Synthesis and Reactivity of Novel Boranes Derived from ... Synthesis and Reactivity of Novel Boranes Derived from Bulky Salicylaldimines: The Molecular Structure of a Maltolato Compound ... Synthesis and Reactivity of Novel Boranes Derived from Bulky Salicylaldimines: The Molecular Structure of a Maltolato Compound ...
Catalytic Hydrolysis of Ammonia Borane by Cobalt Nickel Nanoparticles Supported on Reduced Graphene Oxide for Hydrogen...
... with ammonia borane (AB) as the reducing agent under ambient condition. The CoNi/RGO NPs exhibits excellent catalytic activity ... catalyst to realize the production of hydrogen under mild condition gives more confidence for the application of ammonia borane ... highly efficient catalysts for hydrolytic dehydrogenation of ammonia borane and methylamine borane," New Journal of Chemistry, ... "Nanocatalysts for hydrogen generation from ammonia borane and hydrazine borane," Journal of Nanomaterials, vol. 2014, Article ...
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Ab initio investigation of ammonia-borane complexes for hydrogen storage
British Library EThOS: Iron-catalysed dehydrocoupling/ dehydrogenation of amine- and phosphine-borane adducts
These were then employed as dehydrocoupling catalysts for a variety of phosphine-borane adducts. Although they were shown to be ... and phosphine-borane adducts. Chapter 1 gives a general introduction to mam group element-element bond forming reactions, ... increased catalytic activity was observed in the analogous reactions with primary phosphine-boranes. Polyphosphinoboranes of ... poor catalysts for the dehydrocoupling of secondary phosphine-boranes, ...
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Solid-State NMR as a Spectroscopic Tool for Characterizing Phosphane-Borane Frustrated Lewis Pairs.
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AbstractComplexesAdductsAmineReagentsCompoundsAlpine-BoraneReactionTrisCatalystsAlfa AesarSynthesisChiralBulk ammonia boraneReactionsAsymmetricHydroboration of alkenesComplexKetonesLower boranesHigher boranesPhosphine-boranesStableAlkylCatalysisTetrahydrofuranAlkenesReactMoleculeReactivityIonic liquidsDiboraneBoron and hydrogenSituDerivativesCatalystReactiveCrystallineThermolysisNH3BH3Transfer hydrogenationSodiumReduction
Abstract3
- abstract = "Nanoscale hexagonal BN additive for ammonia borane, AB, is shown to decrease the onset temperature for hydrogen release. (elsevier.com)
- abstract = "Ammonia borane (NH3BH3) is a molecular solid with a high volumetric and gravimetric density of hydrogen. (elsevier.com)
- abstract = "Ammonia borane (AB) containing 19.6 wt {\%} hydrogen is among the strongest candidates for hydrogen storage on-board fuel cell vehicles, though efficient means for hydrogenating the spent material are needed. (elsevier.com)
Complexes9
- Many metal complexes catalyze the dehydrogenation of amine-borane (AB). (wikipedia.org)
- Most of the zirconocene complexes contain the zirconium in the +4 oxidation state, and the systems are not very active catalysts for amine-borane dehydrogenation. (wikipedia.org)
- Ogino, H. "Dehydrocoupling Reactions of Borane-Secondary and -Primary Amine Adducts Catalyzed by Group-6 Carbonyl Complexes: Formation of Aminoboranes and Borazines" J. Amer. Chem. (wikipedia.org)
- Weller, A.S. "Amine- and Dimeric Amino-Borane Complexes of the {Rh(PiPr3)2}+ Fragment and their Relevance to the Transition-Metal-Mediated Dehydrocoupling of Amine-Boranes" Inorg. (wikipedia.org)
- The structural, electronic, and thermodynamic properties of ammonia-borane complexes with varying amounts of hydrogen have been characterized by first principles calculations within density functional theory. (ebscohost.com)
- Metal-borane complexes are emerging as promising systems for study in the context of bifunctional catalysis. (caltech.edu)
- Amine-boranes are stable borane complexes, but very few are used for hydroboration. (prf.org)
- Studies focused on the dehydrogenation of amine-borane by diiron complexes that serve as well-characterized rudimentary models of the diiron subsite in [FeFe]-hydrogenase are reported. (tamu.edu)
- The PS- and PSP-ligands in the complexes below are borane-free analogues of our borane-containing TXPB ligand. (mcmaster.ca)
Adducts5
- Dehydrogenation of amine-boranes or dehydrocoupling of amine-boranes is a chemical process in main group and organometallic chemistry wherein dihydrogen is released by the coupling of two or more amine-borane adducts. (wikipedia.org)
- Borane ammoniate, which is produced by a displacement reaction of other borane adducts, eliminates elemental hydrogen on heating to give borazine (HBNH) 3 . (wikipedia.org)
- This Thesis describes the investigations of iron-catalysed dehydrocoupling/dehydrogenation of various amine- and phosphine-borane adducts. (bl.uk)
- These were then employed as dehydrocoupling catalysts for a variety of phosphine-borane adducts. (bl.uk)
- The most prominent FLPs are based on intramolecular phosphane-borane adducts, whose catalytic properties can be tailored over wide ranges of reactivity and selectivity. (biomedsearch.com)
Amine11
- This process gained some interests due to the potential of using amine-boranes for hydrogen storage. (wikipedia.org)
- Secondary amine-boranes dehydrogenate to form cyclic dimers, or monomeric aminoboranes in the case of more bulky groups on the amine. (wikipedia.org)
- Similarly, primary amine-boranes dehydrogenate through a two step intramolecular process to give aminoborane polymers, which further dehydrogenate to form borazines. (wikipedia.org)
- The two step process is proposed to occur first by dehydrogenation of the amine-borane coordinated to the metal, followed by cyclodimerization in an off-metal step. (wikipedia.org)
- As in the case with the metal carbonyl catalysts, bulky secondary amine-boranes form monomeric aminoboranes. (wikipedia.org)
- In comparison to RhCl(PHCy2)3, the iridium analogue has reduced catalytic activity on the dehydrogenation of non sterically hindered amine-boranes, and increased activity on more sterically hindered substrates. (wikipedia.org)
- Dehydrogenation of ammonia-borane with Brookhart's catalyst results in quantitative formation of the cyclic pentamer [NH2BH2]5 rather than the typically seen cyclic dimers from other amine-borane dehydrogenations. (wikipedia.org)
- Dehydrogenation of amine-boranes is thermodynamically favourable, making the process attractive for hydrogen storage systems. (wikipedia.org)
- Amine-borane dehydrogenation can be coupled with hydride transfer to unsaturated functional groups, usually olefins in an anti-Markovnikov fashion. (wikipedia.org)
- Hydroboration of the olefin and release of H2 from the amine-borane occur in parallel reactions, reducing the percent of olefin reduced. (wikipedia.org)
- The thermal displacement of the tertiary amine-borane, H3B ← NEt3 (B:A(t)) from photochemically generated (μ-SCH2XCH2S)[Fe(CO)3][Fe(CO)2(μ-H)(BH2-NEt3)], 1-B:A(t) through 6-B:A(t), by P(OEt)3 was monitored by time-resolved FTIR spectroscopy. (tamu.edu)
Reagents5
- Borane-based reagents are now widely used in organic synthesis. (wikipedia.org)
- The authors cover practical features of stability, reactivity, and workup, as well as such aspects of allylboration as the stereochemical control elements, including relative diastereoselection with crotylboranes, induced (internal) diastereoselection with chiral carbonyl compounds, auxiliary-controlled enantio-selective allylations with chiral borane reagents, and recent advances in catalysis of allylboration. (thefreedictionary.com)
- First Atropo-Enantioselective Ring Opening of Achiral Biaryls Containing Lactone Bridges with Chiral Hydride-Transfer Reagents Derived from Borane. (docme.ru)
- 3 1 3 , 14] A 2 R = CH3 First Atropo-Enantioselective Ring Opening of Achiral Biaryls Containing Lactone Bridges with Chiral Hydride-Transfer Reagents Derived from Borane** By Gerhard Bringmann* and Thomas Hurtung Dedicuted to Professor Gerhurd Quinkert on the occasion of his 65th birthday Rotationally restricted biaryl compounds from natural and synthetic sources have attracted ever more attention because of their biological activity but also as chiral auxiliaries. (docme.ru)
- Midland Alpine-Borane ® reduction is the asymmetric reduction of a variety of prochiral ketones using Alpine-Borane ® reagents. (sigmaaldrich.com)
Compounds6
- The boranes belong to the class of cluster compounds, which have been the subject of developments in chemical bonding theory. (wikipedia.org)
- Boranes are nonclassically-bonded compounds, that is, there are not enough electrons to form 2-centre, 2-electron bonds between all pairs of adjacent atoms in the molecule. (wikipedia.org)
- For the class of compounds, see boranes . (wikipedia.org)
- Borane compounds which are hydrogen storage materials are hypergolic with white fuming nitric acid as oxidizer. (rsc.org)
- The nature of borane bonds is very distinctive: they are electron-deficient compounds-that is, they do not have a sufficient number of electrons to bind all the atoms by means of the usual two-electron valent bonds. (thefreedictionary.com)
- The addition compounds of some phosphines with boron trifluoride, borane , and trimethylboron. (thefreedictionary.com)
Alpine-Borane3
- S -Alpine-Borane ® may be used in the preparation of (-)-(4 S )-5-methyl-2-hexyn-4-ol, an intermediate for the synthesis of (+)-Prelog-Djerassi lactonic aldehyde. (sigmaaldrich.com)
- S -Alpine-Borane ® is a chiral reducing agent, synthesized from (-)-α-pinene via hydroboration. (sigmaaldrich.com)
- R -Alpine borane is effective at reducing acetylenic ketones to secondary alcohols with reasonable enantioselectivity. (chemtube3d.com)
Reaction10
- This reaction is regioselective , Other borane derivatives can be used to give even higher regioselectivity. (wikipedia.org)
- Results were encouraging, suggesting that borane-pyridine in acidic media could be developed into a useful practical reagent for this reaction. (bl.uk)
- Reaction of 2-aminomethylpyridine with diphenylborinic acid in a mixture of CHCl3-diethyl ether gives diphenyl-(2-aminomethylpyridine-N,N)borane, a cyclic adduct that in presence of environmental moisture yields the N-8-(diphenyl-hydroxy-2-aminomethylpyridine)borane. (edu.mx)
- NHC-boryl oxalates are formed via direct reaction of NHC-boranes and oxalic acid in acetonitrile. (pitt.edu)
- We showed that other organic diacids were unable to produce isolable products upon reaction with NHC-boranes, with the exception of phthalic acid, which produced an NHC-boryl phthalate product. (pitt.edu)
- In Chapter 3, the reaction of NHC-boranes with dibenzoyl peroxide (DBP) and radical initiators is studied. (pitt.edu)
- We found that the inclusion of a radical initiator such as azobisisobutyronitrile (AIBN) or di-tert-butyl hyponitrite (TBHN) increases the rate of the benzoyloxylation reaction, and the use of TBHN results in di-benzoyloxylated NHC-borane products. (pitt.edu)
- On the basis of chiral binaphthyl diene-derived frustrated Lewis pairs (FLPs) developed by our group, in this work, we designed and synthesized a novel class of chiral spiro dienes, which could further react with Piers' borane via the hydroboration reaction to generate chiral boranes in situ . (sioc-journal.cn)
- The ammonia borane (AB) oxidation reaction was studied by cyclic voltammetry at the NPG electrodes. (ucc.ie)
- Firstly, I note that the reaction is normally done with "stabilized" borane, via pre-coordination to thf. (imperial.ac.uk)
Tris8
- Tris(pentafluorophenyl)borane , sometimes referred to as "BCF", is the chemical compound (C 6 F 5 ) 3 B. It is a white, volatile solid. (wikipedia.org)
- Tris(pentafluorophenyl)borane is thermally stable at temperatures wide over 200 °C, resistant to oxygen and water-tolerant. (wikipedia.org)
- The structure of tris(pentafluorophenyl)borane (BCF) was determined by gas electron diffraction. (wikipedia.org)
- Compared with a torsional angle of 56.8(4)° for tris(perfluoro-para-tolyl)borane (BTolF), which is a stronger Lewis acid than BCF, this shows that there is some delocalization of electron density from the para-fluorine atoms to the boron atom that reduces its acidity. (wikipedia.org)
- Tris(pentafluorophenyl)borane is also capable of abstracting hydride to give [(C 6 F 5 ) 3 BH] − , and it catalyzes hydrosilylation of aldehydes. (wikipedia.org)
- Tris(dimethylamino)borane undergoes facile transamination reactions with primary and secondary amines to give higher homologs of tris(alkylamino)boranes. (paperplane.io)
- Tris(dialkylamino)boranes react readily with carboxylic acids to give amides. (paperplane.io)
- The N?D stretching region in the infrared spectrum of the ammonia complex of tris-(2-methoxymethyl-phenol)-borane containing one D atom has been examined. (ucsd.edu)
Catalysts2
- Although they were shown to be poor catalysts for the dehydrocoupling of secondary phosphine-boranes, increased catalytic activity was observed in the analogous reactions with primary phosphine-boranes. (bl.uk)
- New catalysts have been prepared from (S)- and (R)- proline and the asymmetric borane reduction of prochiral ketones using these catalysts has been studied. (metu.edu.tr)
Alfa Aesar1
- Alfa Aesar™ Borane-tetrahydrofuran complex, 1M soln. (fishersci.ca)
Synthesis4
- Dicyclohexylphosphino) borane is a precursor in the synthesis of water-soluble phosphines. (caltech.edu)
- The development of a new method of synthesizing a liquid N-heterocyclic carbene (NHC) borane reagent is described, and a survey of reactivity is completed to demonstrate its effectiveness as a reagent in organic synthesis. (pitt.edu)
- Synthesis of mixed sequence borane phosphonate DNA. (colorado.edu)
- A novel solid-phase phosphoramidite-based method has been developed for the synthesis of borane phosphonate DNA. (colorado.edu)
Chiral2
- With the combination of chiral borane and tri- tert -butylphosphine as an FLP catalyst, an asymmetric Piers-type hydrosilylation of simple ketones was successfully realized to give the desired secondary alcohols with up to 90% ee . (sioc-journal.cn)
- Herein, we show that derivatives of another alkaloid, (-)-cytisine, are useful surrogates for (+)-sparteine in the desymmetrization of prochiral phenyl-, cyclohexyl- and tert-butyl dimethyl phosphine boranes, yielding chiral phosphine boranes in up to 92% ee. (chalmers.se)
Bulk ammonia borane1
- Unfortunately, the bulk ammonia borane may release hydrogen too slowly for use as a hydrogen storage media for an automobile. (pnnl.gov)
Reactions2
Asymmetric2
- It acts as a borane source for oxazaborolidine catalyzed asymmetric reductions. (fishersci.ca)
- Perhaps instead it is less classical than this, being closer to a non-classical bridged species involving an asymmetric π-complex between the borane and the alkene. (imperial.ac.uk)
Hydroboration of alkenes2
Complex5
- Borane(5) is the dihydrogen complex of borane. (wikipedia.org)
- The structure of other boranes is still more complex. (thefreedictionary.com)
- In contrast to hydrocarbons, boranes form complex spatial structures rather than chains of atoms. (thefreedictionary.com)
- Borane-tetrahydrofuran complex is an important reagent used in the reduction of certain functional groups viz. (fishersci.ca)
- Nick: Well, without prior coordination, the "pre-complex" of borane + alkene lies in an extremely shallow minimum ( it can be tricky to find it ) and the barrier out of this minimum is very small. (imperial.ac.uk)
Ketones2
- The use of borane-pyridine as a reducing agent for the reductive amination of aldehydes and ketones with primary aromatic and aliphatic amines was studied. (bl.uk)
- Carboxylic acid - Carboxylic acid - Reduction: Although carboxylic acids are more difficult to reduce than aldehydes and ketones, there are several agents that accomplish this reduction, the most important being lithium aluminum hydride (LiAlH4) and borane (BH3). (schilderoord.nl)
Lower boranes3
- Some lower boranes are pyrophoric in air and react with water. (wikipedia.org)
- The very reactive nature of the lower boranes meant that crystal structure determination was impossible before William Lipscomb developed the requisite techniques. (wikipedia.org)
- The lower boranes oxidize easily, are spontaneously inflammable in air at low temperatures (below 100° C), and are easily hydrolized by water to form boric acid, with the liberation of hydrogen. (thefreedictionary.com)
Higher boranes4
- Further steps give rise to successively higher boranes, with B 10 H 14 as the most stable end product contaminated with polymeric materials, and a little B 20 H 26 . (wikipedia.org)
- the higher boranes (BioHn-decabo-rane, and others) are solids. (thefreedictionary.com)
- The higher boranes are more stable and less reactive. (thefreedictionary.com)
- The higher boranes are produced through the thermal decomposition of diborane. (thefreedictionary.com)
Phosphine-boranes1
- P-chirogenic phosphine ligands can be prepared via desymmetrization of prochiral phosphine boranes using s-BuLi. (chalmers.se)
Stable2
- Borane dimethylsulfide which is more stable than borane-tetrahydrofuran may also be used. (wikipedia.org)
- NHC-boranes and benzoyl peroxide are generally not mutually stable, and the addition of DBP to an NHC-borane causes ionic benzoyloxylation, forming NHC-boryl benzoate products. (pitt.edu)
Alkyl1
- At any rate, at IRC ~8, this hidden intermediate now decides to transfer a hydride to form the alkyl borane rather than to become an explicit intermediate. (imperial.ac.uk)
Catalysis1
- We recently prepared a borane-appended analogue of dppf (dppf is a wide bite-angle bis-phosphine ligand used extensively in late transition metal catalysis). (mcmaster.ca)
Tetrahydrofuran1
- in tetrahydrofuran a stabilising agent is added to prevent the THF from oxidising the borane. (wikipedia.org)
Alkenes2
- In refluxing ethereal solvents, in the presence of methyliodide, strongly complexed borane-amines hydroborated alkenes completely. (bl.uk)
- The successful hydroboration of simple alkenes with borane-triphenylphospbite was achieved in refluxing ethereall solvents in the presence of methyl iodide or benryliodide, or in the presence of sulphur. (bl.uk)
React1
- After examining possible mechanisms for this transformation, we hypothesized that NHC-boranes can react with benzoic acid when a radical initiator is included. (pitt.edu)
Molecule4
- 3 . The preparation of borane carbonyl , BH 3 (CO), played an important role in exploring the chemistry of boranes, as it indicated the likely existence of the borane molecule. (wikipedia.org)
- Boranes containing two to 20 atoms of boron per molecule are known. (thefreedictionary.com)
- Ammonia borane releases a hydrogen molecule, forming polyaminoborane. (pnnl.gov)
- One molecule of dba (dibenzylideneacetone) is bound between palladium and the borane of the TXPB ligand. (mcmaster.ca)
Reactivity2
- The reactivity of ammonia-borane (AB) dimers is investigated using ab initio simulations to determine the most active pathways leading to H 2 evolution. (confex.com)
- Sterically encumbered (perfluoroaryl) borane and aluminate cocatalysts for tuning cation - Anion ion pair structure and reactivity in metallocene polymerization processes. (northwestern.edu)
Ionic liquids1
- When dissolved in ionic liquids , the borane solutions exhibit ignition delay times which are superior to any known hypergolic ionic liquids . (rsc.org)
Diborane1
- Borane BH3 Diborane(6) B2H6 arachno-Tetraborane(10) B4H10 Pentaborane(9) B5H9 Decaborane(14) B10H14 B18H22 iso-B18H22 Hexaborate(6) B6H62− Heptaborate(7) B7H72− Octaborate(8) B8H82− Nonaborate(9) B9H92− Decaborate(10) B10H102− Undecaborate(11) B11H112− Dodecaborate(12) B12H122− The naming of anions is illustrated by octahydridopentaborate, B5H8− The hydrogen count is specified first followed by the boron count. (wikipedia.org)
Boron and hydrogen1
- All boranes decompose to boron and hydrogen at temperatures greater than 700° C. (thefreedictionary.com)
Situ2
- Well dispersed magnetically recyclable bimetallic CoNi nanoparticles (NPs) supported on the reduced graphene oxide (RGO) were synthesized by one-step in situ coreduction of aqueous solution of cobalt(II) chloride, nickel (II) chloride, and graphite oxide (GO) with ammonia borane (AB) as the reducing agent under ambient condition. (hindawi.com)
- The initial decomposition of ammonia borane at 80-100°C into (NH 2 BH 2 ) n and H 2 has been studied by in-situ nmr spectroscopy and kinetic studies using isotopic substitution. (elsevier.com)
Derivatives4
- These borane - ionic liquid solutions appear to be the brightest hope so far to replace hydrazine and its derivatives as fuels in hypergolic propellant systems. (rsc.org)
- Certain borane derivatives can be used to obtain heat-resistant polymers. (thefreedictionary.com)
- Other boranes and certain of their derivatives are extremely toxic. (thefreedictionary.com)
- however, there is a need for a review dedicated to the redox and photophysical characteristics of easily accessible borane and carborane derivatives, which are excellent materials for a wide range of applications. (icmab.es)
Catalyst3
- When catalyzing ammonia-borane dehydrogenation, the catalyst acts homogeneously at a 0.5 mol% catalyst loading. (wikipedia.org)
- The usage of the low-cost, easy-getting catalyst to realize the production of hydrogen under mild condition gives more confidence for the application of ammonia borane as a hydrogen storage material. (hindawi.com)
- NPG is a viable candidate as an anode catalyst for a direct ammonia borane fuel cell. (ucc.ie)
Reactive1
- While some boranes are highly reactive with respect to electron-pair donors, others are not, e.g., the BnHn2− dianions (n = 6-12) as well as many neutral boranes such as B18H22. (wikipedia.org)
Crystalline2
- Boranes of low molecular weight are crystalline materials that have been much investigated over the past decade in the field of chemical hydrogen storage. (mdpi.com)
- Among the chemical storage materials, ammonia borane is one most promising candidate because it has a high hydrogen density of 19.6 wt% and it is a non-flammable and non-explosive crystalline compound at ambient conditions. (kaist.ac.kr)
Thermolysis1
- This review covers various approaches and prospects of facilitating thermolysis, along with a brief discussion of the nature of ammonia borane and the regeneration of spent fuel. (kaist.ac.kr)
NH3BH31
- Magnesium borohydride ammonia borane, Mg(BH4)2(NH3BH3)2, was electrochemically investigated. (elsevier.com)
Transfer hydrogenation1
- Herein we report the first Ni(II)‐catalysed transfer hydrogenation of quinolines using ammonia borane (AB) as hydrogen (H2) source. (nwu.ac.za)
Sodium1
- The selected boranes are ammonia borane NH 3 BH 3 (AB), hydrazine borane N 2 H 4 BH 3 (HB), hydrazine bis borane N 2 H 4 (BH 3 ) 2 (HBB), lithium LiN 2 H 3 BH 3 (LiHB) and sodium NaN 2 H 3 BH 3 (NaHB) hydrazinidoboranes, and sodium triborane NaB 3 H 8 (STB). (mdpi.com)
Reduction4
- For this reason, 2-picoline borane is proposed here as an alternative milder reducing agent, especially, for those enzymes sensitive to borohydride reduction. (csic.es)
- We now report atropo-enantioselective biaryl syntheses by stereoselective reduction of achiral biaryl lactones with modified boranes. (docme.ru)
- Ammonia borane (AB) offers potential as a candidate storage material but is nonetheless challenged by the need for (i) accelerated release of hydrogen, (ii) reduction of gaseous contaminants, and (iii) formation of polymeric residues that enable regeneration. (whiterose.ac.uk)
- Mechanism of the reduction of a carboxylic acid by borane: revisited and revised. (imperial.ac.uk)