Electron-rich olefins as heteroatom donors; the crystal and molecular structures of µ-dimethylthioethene-1,1-dithiolato-SS′S″S‴-bis[chloro(triethyphosphine)platinum(II)] and tetrarbonyl-NN′N″N‴-tetramethylbi(imidazolidin-2-ylidene)-NN″-chromium(0)

Abstract

Electron-rich olefins like [Me[graphic omitted]]₂ yield NN″-bonded complexes, such as the Cr title compound, which thermolyse (for n= 2 more readily than for n= 3) to give carbene–metal complexes; acyclic olefins like C₂(SMe)₄ may afford similar chelate complexes which, however, are not carbene–metal precursors, although Me–S cleavage may occur, for example, to give the diplatinum title compound.