Experimental and Theoretical Studies on the Reduction of CO2 to CO with Chloro(methyl)disilane Components from the Direct ProcessWe are deeply appreciative of generous financial support from the Danish National Research Foundation (grant no. DNRF118) and Aarhus University for support of this work.
Received: 15 May 2017
Accepted after revision: 20 June 2017
21 July 2017 (eFirst)
Published as part of the Cluster Silicon in Synthesis and Catalysis
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.