Bis{μ-2,2′-[(butane-2,3-diylidene)bis(azanylylidene)] dibenzenethiolato}dizinc(II)-dimethyl sulfoxide-methanol (2/0.18/0.82)

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The asymmetric unit in the crystal structure of the title compound, [Zn2(C16H14N2S2) 2]2·0.18C2H6OS·0. 82CH3OH, consists of two ordered bis{μ-2,2′-[(butane-2,3- diylidene)bis(azanylylidene)]dibenzenethiolato}dizinc(II) molecules and a disordered solvent combination at the same location which refined to 18.1 (7)% dimethyl sulfoxide and 81.9 (7)% methanol. The compound has a metallic cluster structure formed by the joining together of two zinc(II) complex molecules, forming a rhomboidal Zn2S2 arrangement. This complex was previously suggested on the basis of nonstructural evidence to be a monomer [Jadamus, Fernando & Freiser (1964). J. Am. Chem. Soc. 86, 3056-3059]. Each ZnII atom is five-coordinated and exhibits distorted trigonal bipyramidal geometry. The structure may be of interest with respect to zinc-thiolate bonds, the coordination chemistry of Schiff bases and the folding of proteins. The structure displays weak intermolecular C - H⋯S, C - H⋯O and C - H⋯N interactions, and contains a unique bonding arrangement of the ligands around the Zn2S2 rhomboid. © 2013 International Union of Crystallography.

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Acta Crystallographica Section C: Crystal Structure Communications