Acta Cryst. (2012). E68, o3415-o3416 [ doi:10.1107/S1600536812046338 ]
Abstract: The base molecule of the title co-crystal, C7H10N2O2S·C7H6O3, is essentially planar, with a maximum deviation of 0.0806 (14) Å for all non-H atoms. The acid molecule is also nearly planar, with a dihedral angle of 8.12 (14)° between the benzene ring and the carboxy group. In the crystal, the acid molecules form an inversion dimer through a pair of O-HO hydrogen bonds with an R22(8) ring motif. The pyrimidine molecules are linked on both sides of the dimer into a heterotetramer via O-HN and C-HO hydrogen bonds with R22(8) ring motifs. The heterotetramers are further linked by weak C-HO hydrogen bonds, forming a tape structure along [1-10].
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