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An Unexpected Mechanism of Hydrosilylation by a Silyl Hydride Complex of Molybdenum

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posted on 16.01.2012, 00:00 by Andrey Y. Khalimon, Stanislav K. Ignatov, Razvan Simionescu, Lyudmila G. Kuzmina, Judith A. K. Howard, Georgii I Nikonov
Carbonyl hydrosilylation catalyzed by (ArN)­Mo­(H)­(SiH2Ph)­(PMe3)3 (3) is unusual in that it does not involve the expected Si–O elimination from intermediate (ArN)­Mo­(SiH2Ph)­(OiPr)­(PMe3)2 (7). Instead, 7 reversibly transfers β-CH hydrogen from the alkoxide ligand to metal.