Acta Cryst. (2009). E65, o244  [ doi:10.1107/S1600536808044012 ]

Biphenyl-3,3',4,4'-tetracarboxylic acid dihydrate

F. Li, W.-W. Wang, X. Ji, C.-C. Cao and D.-Y. Zhu

Abstract: The asymmetric unit of the title compound, C₁₆H₁₀O₈·2H₂O, contains one-half of the centrosymmetric organic molecule and one water molecule. The dihedral angles between the carboxylate groups and the adjacent phenyl ring are 71.31 (3) and 16.67 (3)°, while the carboxylate groups are oriented at a dihedral angle of 72.01 (3)°. In the crystal structure, intermolecular O-HO and bifurcated O-H(O,O) hydrogen bonds link the molecules to form a three-dimensional supramolecular network.

Online 8 January 2009

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