Synthesis and crystal structure of 1-{N'-[(4-chloro-benzene)-sulfon-yl]carbamimido-yl}-3-phenyl-thio-urea dimethyl sulfoxide monosolvate.

The title compound, C14H13ClN4O2S2·C2H6OS, crystallizes in space group P1 with Z = 4. Both main ('parent') mol-ecules are closely similar except for minor differences in the orientations of the aromatic rings. The bond angles at the nitro-gen atoms of the (S)C-NH-Cguanidine moieties are very wide at ca 130°. The parent mol-ecules display intra-molecular hydrogen bonds Ph-N-H⋯N-S and C-N(H)-H⋯O=S, and both formula units involve a bifurcated hydrogen bond system from two N-H donors to the oxygen atom of a DMSO mol-ecule; the orientation of the DMSO mol-ecules is however appreciably different. Further classical hydrogen bonds link the residues to form a ribbon parallel to the b axis.