Received 16 August 2013
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.
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS2013 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FJ2640 ).
The authors thank the Project on Integration of Industry, Education and Research of Guangdong Province (2012B091100430), the Fundamental Research Funds for the Central Universities (2012ZD0038), the National Undergraduate Research Program and the SRP program for financial support.
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