A Dialkylsilylene-Pt(0) Complex with a DVTMS Ligand for the Catalytic Hydrosilylation of Functional Olefins

A platinum(0) complex, bearing a 1,3-divinyl-1,1,3,3-tetra­methyl­disiloxane (DVTMS) and an isolable dialkylsilylene ligand, was successfully synthesized by the reaction between the dialkylsilylene and Karstedt’s catalyst. The downfield-shifted ²⁹Si NMR resonance, the smaller ¹<i>J</i>_Si,Pt value, and the longer Si–Pt distance in this complex relative to the corresponding parameters in related bis­(phosphine)-coordinated silylene-platinum complexes suggest weaker π-back-donation from the Pt center to the silylene, which is, however, still significant when compared to related DVTMS-ligated Pt complexes bearing <i>N</i>-heterocyclic carbenes, <i>N</i>-heterocyclic two-coordinate silylenes, or base-stabilized three-coordinate silylenes. The title complex displays excellent catalytic activity in the hydrosilylation of terminal olefins that contain functional groups such as epoxide and amine moieties