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Acta Cryst. (2013). C69, 1545-1548  [ doi:10.1107/S0108270113031521 ]

Three-dimensional hydrogen-bonded assembly in 2,2'-disulfanyl­idene-5,5'-biimidazolidinyl­idene-4,4'-dione-di­methyl­formamide-water (3/2/4)

D.-H. Wu

Synopsis: 2,2'-Disulfanyl­idene-5,5'-biimidazolidinyl­idene mol­ecules aggregate through N-H...S hydrogen-bonding inter­actions with cyclic motifs [graph set R_{2}^{2}(8)], giving two-dimensional ribbon structures which are close to being parallel. Two independent water mol­ecules associate to form centrosymmetric cyclic hydrogen-bonded (H2O)4 tetra­mer units [graph set R_{4}^{4}(8)].

Formula: 3C6H4N4O2S2·2C3H7NO·4H2O

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