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

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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

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Publication details

The article was received on 19 Apr 2017, accepted on 23 May 2017 and first published on 08 Jun 2017


Article type: Paper
DOI: 10.1039/C7CY00772H
Citation: Catal. Sci. Technol., 2017, Advance Article
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    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, Advance Article , DOI: 10.1039/C7CY00772H

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