PHOTOCHEMICAL SYNTHESIS OF METAL CARBONYL COMPLEXES OF TETRAALKYLDIPHOSPHINE DISULFIDES, [M₂(CO)₁₀(μ-R₂P(S)P(S)R₂)] (M = Mo, W; R = Me, Et, n-Pr, n-Bu)

Abstract

The new complexes [M₂(CO)₁₀(μ-R₂P(S)P(S)R₂)] (M = Mo, W; R = Me, Et, n-Pr, n-Bu), (la)–(1d) and (2a)–(2d) [(1a), M = Mo, R = Me; (1b), M = Mo, R = Et; (1c), M = Mo, R = n-Pr; (1d), M = Mo, R = n-Bu; (2a), M = W, R = Me; (2b), M = W, R = Et; (2c), M = W, R = n-Pr; (2d), M = W, R = n-Bu] have been prepared by the photochemical reaction of M(CO)₆ with R₂P(S)P(S)R₂ (R = Me, Et, n-Pr, n-Bu). The complexes have been characterized by elemental analyses, FT-IR and ³¹P-[¹H]-NMR spectroscopy and FAB-mass spectrometry. The spectroscopic studies suggest cis-bridging bidentate coordination of the ligand between the two metals.

ACKNOWLEDGMENTS

We thank BP (Turkey) for the provision of the photochemical apparatus. We are grateful to Dr. I. Topaloglu for obtaining the mass spectra at the University of Bristol. We thank the British Council (The Foreign and Commonwealth Office Scholarships) for financial support to Ozan Sanlı Şentürk and Fadime Ugˇur (Sarikahya). We are grateftul to Mr. P. Heath for obtaining the NMR data at the University of Reading.