Acta Cryst. (2013). E69, o1503 [ doi:10.1107/S1600536813024197 ]
Abstract: In the crystal structure of the title compound, C17H12N2O2·2H2O, the carboxylate group is linked via O-HO hydrogen bonds to two water molecules. The crystal packing is best described as parallel layers (viewed along the a axis) of viologen and water molecules associated via O-HO hydrogen bonds and - interactions, with a centroid-centroid separation of 3.8276 (9) Å.
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