Transition metal–carbon bonds. Part XXVII. Oxidative addition reactions of [PtMe2(dias)], dias o-phenylenebis(dimethylarsine)

Abstract

[PtMe₂(dias)] is shown to undergo oxidative addition reactions with alkyl or acyl halides at least as readily as a corresponding complex with a monodentate ligand such as cis-[PtMe₂(AsMe₂Ph)₂]. Acyl halides add trans to give platinum (IV) adducts, [PtXRMe₂(dias)](X = halogen; R = acetyl or benzoyl) but allylic halides add cis(R = allyl or 2-methylallyl). The stereochemistries follow from the ¹H n.m.r. and i.r. spectra. These complexes show interesting correlations between values of J(¹⁹⁵Pt–CH₃), τCH₃, ν(Pt–C), ν(Pt–Cl) and δ_s(CH₃).