(Z)-5-[(5-Methyl-1H-imidazol-4-yl)methyl­idene]-2-sulfanyl­idene-1,3-thia­zolidin-4-one monohydrate: a three-dimensional hydrogen-bonded framework structure

The non-H atoms in the organic component of the title compound, C₈H₇N₃OS₂·H₂O, are almost coplanar, as the dihedral angle between the two ring planes is only 1.8 (2)°; there is a wide C-C-C angle of 127.8 (3)° at the methine C atom linking the two rings. The mol­ecular components are linked into a three-dimensional framework structure by two-centre hydrogen bonds of N-H...O and O-H...N types, together with a three-centre O-H...(N,S) system. Comparisons are made with some (Z)-5-arylmethylidene-2-sulfanyl­idene-1,3-thia­zolidin-4-ones.