The synthesis and X-ray crystal structures of homoleptic tetrahedral aryls of osmium(IV) and of cyclohexyls of ruthenium(IV), osmium(IV), and chromium(IV)

Abstract

The interaction of o-tolylmagnesium bromide or AlPh3(OEt2) with osmium tetraoxide leads to the isolation of the homoleptic, tetrahedral osmium(IV) compounds OsR4(R = C6H4Me-o or C6H5). Thermally stable M (C6H11)4 compounds (M = Ru, Os, or Cr; C6H11= cyclohexyl) are obtained by the interaction of the Grignard reagent with Ru2(O2CMe)4Cl, Os2(O2CMe)4Cl2, and CrCl3(thf)3(thf = tetrahydrofuran) respectively. The structures of all five compounds have been determined by X-ray crystallography.