The First Class of Square-Planar Platinum(II) Complexes Containing Electron-Poor Alkenes. Rare Insertion of an Alkene into a Pt−Alkyl Bond

The first class of square-planar Pt(II) complexes bearing electron-poor alkenes, i.e., [PtMe( N, N -chelate)(η 2 -CH 2 CHCOR)]BF 4 (R = H, NMe 2, Me, OMe), is described. By using N,N ligands with suitable steric properties, it was possible to inhibit olefin dynamic processes in solution, thus allowing a thorough characterization of the complexes. Insertion of methyl acrylate into the Pt−Me bond provides a rare example of migratory insertion of an alkene into a Pt−alkyl bond.