ja5059923_si_002.cif (28.51 MB)
Molybdenum Catalyzed Ammonia Borane Dehydrogenation: Oxidation State Specific Mechanisms
dataset
posted on 2015-12-17, 03:42 authored by Joshua
A. Buss, Guy A. Edouard, Christine Cheng, Jade Shi, Theodor AgapieThough 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 Mo0 N2 complex, 5, and a MoII 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 (MoII(H)2, [MoII(H)]+, and [MoIV(H)3]+) relevant to AB chemistry were characterized.
