(Dimethyl sulfoxide-κO)bis(thiosemicarbazide-κ2 N1,S)zinc dipicrate dimethyl sulfoxide solvate monohydrate

Abstract

The title complex, [Zn(CH5N3S)2(C 2H6OS)](C6H2N3O 7)2·C2H6OS·H 2O, is composed of a [Zn(thio-semi-carbazide)2(DMSO)] 2+ cation (where DMSO is dimethyl sulfoxide), and two picrate anions. In the asymmetric unit, there is also a solvent mol-ecule of DMSO and a water mol-ecule of crystallization. In the cation, the ZnII atom is five-coordinated in a distorted square-pyramidal geometry. It coordinates to the O atom of a DMSO mol-ecule and to the S and one N atom of two thio-semicarbazide mol-ecules, which behave as bidentate ligands coordinating in a trans arrangement. In the crystal, a number of N -H⋯O, O -H⋯O and N -H⋯S hydrogen bonds link the mol-ecules into two-dimensional networks. These networks are further linked via weak C -H⋯O inter-actions, forming a three-dimensional arrangement. Positional disorder in one methyl group of the coordinated DMSO molecule and in the two picrate anions was observed.