| Summary: | In the title compound, C13H13N5OS·H2O, the thiourea molecules closely resemble each other and are approximately planar; the dihedral angles formed between the terminal benzene rings are 7.88 (8) and 7.20 (8)°, respectively. The observed planarity correlates with the presence of bifurcated N—H...(O,N) hydrogen bonds. In the crystal, the molecules are connected into supramolecular double chains via a combination of N—H...S (linking the two independent molecules), O—H...O and O—H...N (linking dimeric aggregates into a supramolecular chain via hydroxy–water, water–water and water–pyrazine interactions) and O—H...S hydrogen bonds (connecting two chains). The chains are further connected by C—H...N and C—H...S interactions.
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