Synlett
DOI: 10.1055/s-0036-1590840
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© Georg Thieme Verlag Stuttgart · New York

Experimental and Theoretical Studies on the Reduction of CO2 to CO with Chloro(methyl)disilane Components from the Direct Process

Mathias Flinkera, b, Sara Lopeza, b, Dennis U. Nielsena, Kim Daasbjerga, Frank Jensen*b, Troels Skrydstrup*a, b
  • aCarbon Dioxide Activation Center, Interdisciplinary Nanoscience Center, Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
  • bDepartment of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark   Email: frj@chem.au.dk   Email: ts@chem.au.dk
We are deeply appreciative of generous financial support from the Danish National Research Foundation (grant no. DNRF118) and ­Aarhus University for support of this work.
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Publication History

Received: 15 May 2017

Accepted after revision: 20 June 2017

Publication Date:
21 July 2017 (eFirst)

Published as part of the Cluster Silicon in Synthesis and Catalysis

Abstract

Three disilanes, (CH3)3SiSi(CH3)3, Cl(CH3)2SiSi(CH3)2Cl, and Cl2(CH3)SiSi(CH3)Cl2, all representing components of the Direct Process residue for the industrial synthesis of chloromethylsilanes, were evaluated for their abilities to reduce carbon dioxide to carbon monoxide upon treatment with fluoride salts. In particular, Cl(CH3)2SiSi(CH3)2Cl proved to be highly efficient upon the use of stoichiometric amounts of potassium bifluoride. DFT calculations performed on the reduction steps with (CH3)3SiSi(CH3)3 and fluorinated analogues of this disilane suggest that the previously proposed pathway involving an intermediate silacarboxylic acid is plausible.

Supporting Information