Experimental Crystal data

R factor = 0.046; wR factor = 0.145; data-to-parameter ratio = 15.7. In the title compound, C21H23NO2, the piperidine ring adopts a distorted boat conformation. The two phenyl rings form dihedral angles of 64.6 (1) and 87.8 (1) with the best plane through the piperidine ring. The crystal packing is governed by intermolecular C—H O interactions. Related literature For the biological activity of piperidine derivatives, see: Ponnuswamy et al. (2002). For hydrogen-bond motifs, see: Bernstein et al. (1995). For puckering and asymmetry para