1,1′-Biphenyl-2,2′,5,5′-tetracarboxylic acid

Abstract

In the title compound, C16H10O8 or H4bptc, the dihedral angle between the planes of the phenyl rings is 51.90 (4)°. The asymmetric unit contains one half-molecule; complete molecules are generated by a twofold rotation axis. In the crystal, O—H...O and C—H...O hydrogen-bonding generate a two-dimensional supramolecular network. In addition, weak π–π interactions are also observed.

Keywords

• crystal structure
• biphenyltetracarboxylic acid
• H4bptc
• hydrogen-bonding
• π–π interaction