Interaction of magnesium dialkyls with binuclear transition metal acetates: crystal structure of bis(trimethylsilylmethyl)bis(trimethylphosphine) bis(µ-trimethylsilymethyl)-dichromium(II)

Abstract

Reaction between the dialkyl magnesium reagents MgR₂(R = Me, CH₂SiMe₃, or CH₂CMe₃) and binuclear acetates of Cr, Mo, Re, Ru, and Rh containing metal–metal bonds gives either monomeric or binuclear species, the metal–metal bond being retained in the latter, and in some cases, loss of a hydrogen atom from a methyl group of the CH₂SiMe₃ ligand leading to the formation of a metallocycle [graphic omitted]H₂; the structure of the binuclear compound Cr₂(CH₂SiMe₃)₄(PMe₂)₂ has been determined by X-ray diffraction methods.