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Updated: May 29, 2025

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
CO2 hydrosilylation catalyzed by an N-heterocyclic carbene (NHC)-stabilized stannyliumylidene
Dechuang Niu1, Arseni Kostenko1, John A Kelly1
1TUM School of Natural Sciences, Department of Chemistry, Institute of Silicon Chemistry and Catalysis Research Center, Technische Universität München Lichtenbergstraße 4 85748 Garching bei München Germany s.inoue@tum.de.
Abstract:
The di-N-heterocyclic carbene (NHCs) stabilized stannyliumylidene, [MesTerSn(IMe4)2][BArF], (MesTer = 2,6-Mes2C6H3, Mes = 2,4,6-Me3-C6H2, IMe4 = 1,3,4,5-tetramethylimidazol-2-ylidene, BArF = (3,5-(CF3)2-C6H5)4B), was isolated from the reaction of (MesTer)SnCl with two equivalents of IMe4, followed by one equivalent of Na[BArF]. This stannyliumylidene acts as a precatalyst for the homogeneous hydrosilylation of CO2. Experimental mechanistic studies and quantum chemical calculations have been conducted to elucidate the catalytically active species and the mechanism for the transformation, revealing the stannyliumylidene [MesTerSn(CO2IMe4)2][BArF], which is formed in the presence of CO2, as the catalytically active species.
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