Crystal structure of -(4-oxo-2-sulfanyl-idene-1,3-thia-zolidin-3-yl)-2-(thio-phen-3-yl)acetamide.

The title compound, CHNOS, crystallizes with two mol-ecules ( and ) in the asymmetric unit. Both have similar conformations (overlay r.m.s. deviation = 0.209 Å) and are linked by an N-H⋯O hydrogen bond. In both mol-ecules, the thio-phene rings show orientational disorder, with occupancy factors of 0.6727 (17) and 0.3273 (17) for mol-ecule , and 0.7916 (19) and 0.2084 (19) for mol-ecule . The five-membered rings make an angle of 79.7 (2)° in mol-ecule and an angle of 66.8 (2)° in mol-ecule . In the crystal, chains of mol-ecules running along the -axis direction are linked by N-H⋯O hydrogen bonds. The inter-action of adjacent chains through N-H⋯O hydrogen bonds leads to two types of ring structures containing four mol-ecules and described by the graph-set motifs (18) and (14).