Acta Cryst. (2008). E64, m72-m73  [ doi:10.1107/S1600536807055997 ]

₃-Iodo-tri-₃-sulfido-sulfidotris[tris(4-methoxyphenyl)phosphine-P]tricopper(I)tungsten(VI) N,N-dimethylformide solvate

G. Tang, J. Zhang and C. Zhang

Abstract: A new W/S/Cu cluster, [Cu₃WIS₄(C₂₁H₂₁O₃P)₃]·C₃H₇NO, was formed by the reaction of ammonium tetrathiotungstate(VI), cuprous iodide and tris(4-methoxyphenyl)phosphine in N,N-dimethylformamide. The title compound exhibits a heavily distorted cubane-like skeleton in which the average Cu-I, Cu-S and W-₃-S distances are 2.934, 2.302 and 2.249 Å, respectively. The W atom exhibits tetrahedral geometry, formed by three ₃-S and one terminal S atom; the W-S(terminal) bond length is 2.1426 (13) Å. Each Cu atom is coordinated by one P atom from a tris(4-methoxyphenyl)phosphine (mop), two ₃-S and one ₃-I atom, forming a distorted tetrahedral coordination geometry. Some of the mop ligand methyl groups have large librations. Together with the three neutral mop ligands, the title compound is neutral; this contrasts with the all-halogen-coordinated Mo/S/Ag clusters with the same structure, which carry negative charge.

Online 6 December 2007

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