Crystal structure of 4-[(E)-(2-carbamothioylhydrazinylidene)methyl]benzoic acid

The title compound, C9H9N3O2S, is close to planar with an r.m.s. deviation of 0.032 angstrom . An intramolecular N-H center dot center dot center dot N hydrogen bond closes an S(5) ring. In the crystal, molecules are connected into inversion dimers of the R-2(2) (8) type by pairs of O-H center dot center dot center dot O interactions. The dimers are further connected by pairs of N-H center dot center dot center dot S interactions, which also complete R-2(2) (8) ring motifs. The chains of dimers are cross-linked by NH center dot center dot center dot O bonds and hence R-4(2) (28) rings are completed. Taken together, these interactions lead to infinite sheets propagating in the (122) plane.