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Acta Cryst. (2013). E69, o1596
[ doi:10.1107/S1600536813026482 ]

4'-Acetyl-3''-carbamoyl-[1,1':3',1''-terphenyl]-2-carboxylic acid

Y. Ishikawa, N. Yoshida and T. Suzuki

Abstract: In the title m-terphenyl derivative, C22H17NO4, the dihedral angles between the aromatic rings of the benzoic acid-acetophenone, acetophenone-benzamide and benzoic acid-benzamide units are 45.39 (8), 48.02 (8) and 42.93 (8)°, respectively. The carbamoyl and carboxyl groups are disordered with a refined occupancy ratio of 0.558 (15):0.442 (15). In the crystal, molecules are linked through O-H...O and N-H...O hydrogen bonds between terminal carboxyl and carbamoyl groups in a bidentate manner, and antiparallel helices are formed which extend along the b-axis direction.

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