Acta Cryst. (2007). E63, o3722 [ doi:10.1107/S1600536807037622 ]
Abstract: In the title compound, C14H10O4S2·0.5CH3OH, the molecule adopts a gauche conformation around the central C-C bond. Intermolecular O-HO hydrogen bonds between carboxyl groups link the molecules into zigzag chains. Between chains, the thiophene rings form - stacking interactions with a centroid-centroid distance of 3.98 Å. The methanol solvent molecule forms an O-HO hydrogen bond to one carboxyl group and is disordered about a crystallographic centre of inversion.
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