2-(p-toluoyl)benzoic acid

The title compound, C15H12O3, crystallizes as a centrosymmetric dimer hydro gen bonded via the carboxylic acid groups. The carboxylic acid group is nea rly coplanar with the adjacent aromatic ring, which is almost perpendicular to the tolyl ring. In contrast to all comparable o-benzoylbenzoic acid str uctures retrieved from the Cambridge Structural Database, the torsion angle between the carbonyl group linking both aromatic rings and the phenyl ring carrying the carboxylic acid group is less than 90 degrees, resulting in a shorter distance between the two carbonyl O atoms.