Highly Efficient Catalytic Hydrosilylation of Carbon Dioxide by an N-heterocyclic Carbene Copper Catalyst

The N-heterocyclic carbene-copper alkoxide complex [(IPr)Cu(OtBu)] acts as a highly efficient catalyst for the hydrosilylation of carbon dioxide with a hydrosilane. The desired product, silyl formate could be isolated in multigram quantity under solvent free conditions. A copper formate catalyst intermediate was successfully isolated and structurally characterized, thus offering important insight into the mechanistic details.