Issue 13, 2017

Reduction of carbon dioxide and organic carbonyls by hydrosilanes catalysed by the perrhenate anion

Abstract

The simple perrhenate salt [N(hexyl)4][(ReO4)] acts as a catalyst for the reduction of organic carbonyls and carbon dioxide by primary and secondary hydrosilanes. In the case of CO2, this results in the formation of methanol equivalents via silylformate and silylacetal intermediates. Furthermore, the addition of alkylamines to the reaction mixture favours catalytic amine N-methylation over methanol production under certain conditions. DFT analysis of the mechanism of CO2 reduction shows that the perrhenate anion activates the silylhydride forming a hypervalent silicate transition state such that the CO2 can directly cleave a Si–H bond.

Graphical abstract: Reduction of carbon dioxide and organic carbonyls by hydrosilanes catalysed by the perrhenate anion

Supplementary files

Article information

Article type
Paper
Submitted
19 Apr 2017
Accepted
23 May 2017
First published
08 Jun 2017
This article is Open Access
Creative Commons BY license

Catal. Sci. Technol., 2017,7, 2838-2845

Reduction of carbon dioxide and organic carbonyls by hydrosilanes catalysed by the perrhenate anion

D. S. Morris, C. Weetman, J. T. C. Wennmacher, M. Cokoja, M. Drees, F. E. Kühn and J. B. Love, Catal. Sci. Technol., 2017, 7, 2838 DOI: 10.1039/C7CY00772H

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