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 1JSi,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 N-heterocyclic
carbenes, N-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.