Crystal and molecular structure of pentacarbonyl(trimethylphosphine sulphide)chromium(0)

Abstract

The crystal structure of the title compound has been determined, by Patterson and Fourier methods, from diffracto-meter data. Crystals are monoclinic, a= 6·445(1), b= 18·752(3), c= 10·897(2)Å, and β= 90·12(2)°, space-group P2₁/n. The structure was refined, by least-squares methods, to R 0·065 for 2002 independent reflections. Co-ordination around the chromium atom is distorted octahedral. Metal–ligand bond distances [Cr–S 2·510(2), Cr–C(trans) 1·815(8), and Cr–C(cis) 1·900(4)Å(mean)] are consistent with simple σ donation from sulphur to chromium, with little or no π interaction. There is no evidence for significant interaction between the SPMe3 ligand and any of the cis-carbonyl groups.