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

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—H...O and bifurcated O—H...(O,O) hydrogen bonds link the molecules to form a three-dimensional supramolecular network.