[2-(3,4-Dimethylbenzoyl)phenyl]-(4-methoxyphenyl)methanone

The title molecule, C23H20O3, is disordered with a 180 degrees rotation about an axis normal to the length of the molecule, with the major and minor components in a 0.545 (5):0.455 (5) ratio. In the major component, the central benzene ring forms dihedral angles of 72.34 (3) and 69.46 (3)degrees with the dimethylsubstituted and methoxy-substituted benzene rings, respectively. Moreover, the central benzene ring forms dihedral angles of 50.86 (5) and 58.43 (4)degrees with the mean planes of the ketone groups. In the minor component, the corresponding dihedral angles between the benzene rings are 71.36 (4) and 67.94 (4)degrees and the dihedral angles between the benzene ring and the ketone groups are 56.44 (9) and 55.51 (8)degrees. In the crystal, C-H center dot center dot center dot O interactions generate a C(9) chain along the a-axis direction.