Experimental Crystal data

R factor = 0.042; wR factor = 0.119; data-to-parameter ratio = 14.9. The molecular structure of the title compound, C21H15ClN2O2, features one strong intramolecular N—H O resonance-assisted hydrogen bond (RAHB). In the crystal, molecules form inversion-related dimers via pairs of weak inter-molecular N—H O contacts. These dimers are further stabilized via three weak C—H O contacts, developing the three-dimensional structure. Related literature For resonance-assisted hydrogen bonds, see: Bertolasi et al