Molybdenum Catalyzed Ammonia Borane Dehydrogenation: Oxidation State Specific Mechanisms | Zendy

Joshua A. Buss | Zendy; Guy A. Edouard | Zendy; Christine Cheng | Zendy; Jade Shi | Zendy; Theodor Agapie | Zendy

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Molybdenum Catalyzed Ammonia Borane Dehydrogenation: Oxidation State Specific Mechanisms

Author(s) -

Joshua A. Buss,

Guy A. Edouard,

Christine Cheng,

Jade Shi,

Theodor Agapie

Publication year - 2014

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja5059923

Subject(s) - dehydrogenation , chemistry , ammonia borane , catalysis , acetonitrile , ammonia , molybdenum , oxidation state , medicinal chemistry , ligand (biochemistry) , borane , reaction mechanism , inorganic chemistry , metal , photochemistry , organic chemistry , biochemistry , receptor

Though numerous catalysts for the dehydrogenation of ammonia borane (AB) are known, those that release >2 equiv of H2 are uncommon. Herein, we report the synthesis of Mo complexes supported by a para-terphenyl diphosphine ligand, 1, displaying metal-arene interactions. Both a Mo(0) N2 complex, 5, and a Mo(II) bis(acetonitrile) complex, 4, exhibit high levels of AB dehydrogenation, releasing over 2.0 equiv of H2. The reaction rate, extent of dehydrogenation, and reaction mechanism vary as a function of the precatalyst oxidation state. Several Mo hydrides (Mo(II)(H)2, [Mo(II)(H)](+), and [Mo(IV)(H)3](+)) relevant to AB chemistry were characterized.

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