Results 161 to 170 of about 3,729 (203)

Ammonia-mediated, large-scale synthesis of ammonia borane

Dalton Trans., 2014
The presence of NH3 allows a high concentration, ambient temperature synthesis of ammonia borane from sodium borohydride in air using reagent-grade THF.
P Veeraraghavan, Ramachandran, Hitesh, Mistry, Ameya S, Kulkarni, Pravin D, Gagare   +3 more
openaire   +2 more sources

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, Xuenian Chen, Sheldon G Shore   +2 more
exaly   +2 more sources

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
openaire   +2 more sources

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

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
openaire   +2 more sources

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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Interaction of ammonia borane with Li2NH and Li3N

Dalton Trans., 2010
Interaction of NH(3)BH(3) and Li(2)NH (or Li(3)N) in THF leads to the formation of NH(3) and LiNH(2)BH(3), which further react with each other and produce ca. 10 wt.% hydrogen at 45 degrees C.
Xiong, Z., Chua, Y., Wu, G., Wang, L., Wong, M.W., Kam, Z.M., Autrey, T., Kemmitt, T., Chen, P.   +8 more
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Ammonia–Borane and Amine–Borane Dehydrogenation Mediated by Complex Metal Hydrides

Chemical Reviews, 2016
This review is a comprehensive survey of the last 10 years of research on ammonia-borane and amine-borane dehydrogenation mediated by complex metal hydrides (CMHs), within the broader context of chemical hydrogen storage. The review also collects those cases where CMHs are the catalyst spent form or its resting state.
Rossin Andrea, Peruzzini Maurizio
openaire   +3 more sources

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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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
openaire   +2 more sources