Received 14 May 2012
In the title hydrated molecular salt, C2H10N22+·2C8H9N2O4-·H2O, an intramolecular O-HO hydrogen bond occurs in the anion, forming an S(7) ring. The -CO2 and -CO2H groups make dihedral angles of 3.2 (2) and 2.0 (3)°, respectively, with the five-membered ring. In the crystal, N-HO, N-HN and O-HO hydrogen bonds lead to the formation of a three-dimensional supramolecular architecture. The methyl group in the anion is disordered over two sets of sites in a 0.716 (9):0.284 (9) ratio. The ethylenediamine cation is generated by symmetry and the water molecule lies on a twofold axis.
Data collection: SMART (Bruker, 2001); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: GG2081 ).
This work was supported financially by the North China University of Water Conservancy and Electric Power, China.
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