Crystal structure of (5Z)-5-(5-bromo-2-hydroxybenzylidene)-1,3-thiazolidine-2,4-dione

In the title compound, C10H6BrNO3S, the dihedral angle between the thiazolidine ring (r.m.s. deviation = 0.014 Å) and the benzene ring is 5.78 (14)°. The S atom of the heterocyclic ring is syn to the OH group attached to the benzene ring. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R22(8) loops. The dimers are linked into [001] ribbons by pairwise O—H...O hydrogen bonds with R22(18) motifs. There are no short contacts involving the Br atom.