Mechanistic Aspects of Transition-Metal Catalyzed Dehydrogenative Silane Coupling Reactions
- 1 April 1990
- journal article
- research article
- Published by Taylor & Francis in Comments on Inorganic Chemistry
- Vol. 10 (1) , 37-51
- https://doi.org/10.1080/02603599008048649
Abstract
Dehydrogenative silane couplings to give Si-Si bonded compounds are catalyzed by a number of transition-metal complexes. A mechanism based on transition-metal silylene complexes, LnM = SiR2, seems possible for some of these reactions; however, little evidence exists to support their involvement in known systems. Based on precedents that exist in stoichiometric reactions, a more likely mechanism for late transition-metal catalysts consists of oxidative addition/reductive elimination cycles. For early transition metal (d°) catalysts, evidence accumulated to date points toward a “σ-bond metathesis” mechanism based on concerted, 4-center transition states.Keywords
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