Results 161 to 170 of about 9,481 (204)

Efficient Catalysis of Ammonia Borane Dehydrogenation

Journal of the American Chemical Society, 2006
In the presence of an iridium pincer complex, dehydrogenation of ammonia borane (H3NBH3) occurs rapidly at room temperature in tetrahydrofuran to generate 1.0 equivalent of H2 and [NH2BH2]5. A metal borohydride complex has been isolated as a dormant form of the catalyst which can be reactivated by reaction with H2.
Melanie C, Denney, Vincent, Pons, Travis J, Hebden, D Michael, Heinekey, Karen I, Goldberg   +4 more
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Ruthenium-Catalyzed Dehydrogenation of Ammonia Boranes

Journal of the American Chemical Society, 2008
The dehydrogenation of ammonia borane (AB) and methylammonia borane (MeAB) is shown to be catalyzed by several Ru-amido complexes. Up to 1 equiv of H2 (1.0 system wt %) is released from AB by as little as 0.03 mol % Ru within 5 min, and up to 2 equiv of H2 (3.0 system wt %) are released from MeAB with 0.5 mol % Ru in under 10 min at room temperature ...
Nicole, Blaquiere, Sarah, Diallo-Garcia, Serge I, Gorelsky, Daniel A, Black, Keith, Fagnou   +4 more
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Hydrazine borane-induced destabilization of ammonia borane, and vice versa

Journal of Hazardous Materials, 2014
In the field of solid-state chemical hydrogen storage, ammonia borane NH3BH3 has been widely studied while hydrazine borane N2H4BH3 can be considered as a "novel" material. In the present work, we investigated the behaviour of these boranes when mixed together in a mole ratio of 1:1. Hydrazine borane and ammonia borane destabilize each other.
Jean-Fabien, Petit, Georges, Moussa, Umit B, Demirci, François, Toche, Rodica, Chiriac, Philippe, Miele   +5 more
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The role of ammonia in promoting ammonia borane synthesis

Dalton Transactions, 2016
Mechanistic studies point toward added ammonia acting as a reagent while promoting the high-yielding synthesis of pure ammonia borane from sodium borohydride and ammonium salts.
P Veeraraghavan, Ramachandran, Ameya S, Kulkarni   +1 more
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Borane−Ammonia Complexes Stabilized by Hydrogen Bonding

Organic Letters, 2002
Novel boron-ammonia complexes, wherein an NH(3) molecule is tightly bound through all four of its atoms, have been prepared and studied. The solid-state structure of ortho MOM-phenyllithium is reported. [reaction: see text]
Hughes, Chambers C., Scharn, Dirk, Mulzer, Johann, Trauner, Dirk   +3 more
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Reductive amination using ammonia borane

Tetrahedron Letters, 2010
Abstract A variety of primary, secondary, and tertiary amines were prepared in 84–95% yields using ammonia borane for the reductive amination of aldehydes and ketones in the presence of titanium isopropoxide.
P. Veeraraghavan Ramachandran, Pravin D. Gagare, Kaumba Sakavuyi, Paul Clark   +3 more
openaire   +1 more source

Hydrolysis of solid ammonia borane

Journal of Power Sources, 2010
Abstract Ammonia borane NH3BH3 is a promising hydrogen storage material by virtue of a theoretical gravimetric hydrogen storage capacity (GHSC) of 19.5 wt%. However, stored hydrogen has to be effectively released, one way of recovering this hydrogen being the metal-catalyzed hydrolysis.
Demirci, Umit, Miele, Philippe
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Ammonia borane, past as prolog

Journal of Organometallic Chemistry, 2014
Abstract Ammonia borane (NH3BH3), the simplest of the amine boranes, has yielded its secrets grudgingly since its first attempted synthesis in 1923. Here we review aspects of its history that yield insight into its chemistry and properties with special attention to current efforts to develop ammonia borane as a solid hydrogen storage material by ...
Huizhen Li, Qiuyu Yang, Xuenian Chen, Sheldon G. Shore   +3 more
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Noncatalytic hydrothermolysis of ammonia borane

International Journal of Hydrogen Energy, 2008
Abstract Hydrolysis of ammonia borane (AB) is attractive as a chemical method for hydrogen storage. The use of catalysts is, however, usually required. In the present paper, two new methods for releasing hydrogen from AB and water are investigated which do not involve any catalyst.
Moiz Diwan, Victor Diakov, Evgeny Shafirovich, Arvind Varma   +3 more
openaire   +1 more source

Dehydrogenation of ammonia-borane by Shvo's catalyst

Chemical Communications, 2010
Shvo's cyclopentadienone-ligated ruthenium complex is an efficient catalyst for the liberation of exactly two molar equivalents of hydrogen from ammonia-borane, a prospective hydrogen storage medium. The mechanism for the dehydrogenation features a ruthenium hydride resting state from which dihydrogen loss is the rate-determining step.
Brian L, Conley, Travis J, Williams
openaire   +2 more sources