2-(N,N-Diphenylamino)benzoic acid

Shaped like a distorted propeller, molecules of the title compound, C19H15N O2, form centrosymmetric dimers in the crystalline phase in which the carbo xy groups are linked through two hydrogen bonds. These dimers are arranged in columns held together via dispersive interactions between the phenyl moi eties. The N atom and the three surrounding C atoms lie almost in the same plane, which implies that the lone electron pair of the N atom is involved in conjugation with the pi systems of the phenyl fragments.