Acta Cryst. (2009). E65, o132-o133  [ doi:10.1107/S1600536808042207 ]

4,4'-Bipyridinium bis(perchlorate)-4-aminobenzoic acid-4,4'-bipyridine-water (1/4/2/2)

Q.-H. Meng, L. Han, J.-D. Hou, Y.-F. Luo and R.-H. Zeng

Abstract: In the structure of the title compound, C₁₀H₁₀N₂²⁺·2ClO₄^-·4C₇H₇NO₂·2C₁₀H₈N₂·2H₂O, the 4,4'-bipyridinium cation has a crystallographically imposed centre of symmetry. The cation is linked by N-HN hydrogen bonds to adjacent 4,4'-bipyridine molecules, which in turn interact via O-HN hydrogen bonds with 4-aminobenzoic acid molecules, forming chains running parallel to [30]. The chains are further connected into a three-dimensional network by N-HO and O-HO hydrogen-bonding interactions involving the perchlorate anion, the water molecules and the 4-aminobenzoic acid molecules. In addition, - stacking interactions with centroid-centroid distances ranging from 3.663 (6) to 3.695 (6) Å are present. The O atoms of the perchlorate anion are disordered over two sets of positions, with refined site occupancies of 0.724 (9) and 0.276 (9).

Online 17 December 2008

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