Experimental

R factor = 0.036; wR factor = 0.097; data-to-parameter ratio = 13.1. The asymmetric unit of the title compound, C32H23NO2, comprises two crystallographically independent molecules. In both molecules, the geometries about the N atoms deviate significantly from the ideal trigonal–planar geometry with bond-angle sums about the N atom of 359.32 in one molecule and 359.86 in the other. The O atoms of the carbonyl groups are deviated significantly from the central benzene rings by 0.6747 (14) and 1.1223 (13) A ̊ in one molecule and 0.6230 (13) and 1.1559 (12) A ̊ in the other. In the diphenyl-aniline units, the terminal phenyl rings are almost orthogonal to each other, with dihedral angles of 89.79 (9) and 89.76 (9). The crystal structure features C—H O and C—H interactions. Related literature For the biological importance and usage of diketones, see: Sugawara et al. (2001); Kennedy et al. (2002); Song et al. (2006); Kakimoto et al. (2008). For related structures, see