Affiliation:
1. Université Paris-Saclay CEA CNRS, NIMBE 91191 Gif-sur-Yvette France
Abstract
AbstractThe challenging metal‐free catalytic hydrogenolysis of silyl chlorides to hydrosilanes is unlocked by using an inverse frustrated Lewis pair (FLP), combining a mild Lewis acid (Cy2BCl) and a strong phosphazene base (BTPP) in mild conditions (10 bar of H2, r. t.). In the presence of a stoichiometric amount of the base, the hydrosilanes R3SiH (R=Me, Et, Ph) are generated in moderate to high yields (up to 95 %) from their chlorinated counterparts. A selective formation of the valuable difunctional monohydride Me2SiHCl is also obtained from Me2SiCl2. A mechanism is proposed based on stoichiometric experiments and DFT calculations; it highlights the critical role of borohydride species generated by the heterolytic splitting of H2.
Funder
HORIZON EUROPE European Research Council
Subject
General Chemistry,Catalysis,Organic Chemistry