Experimental Crystal data

R factor = 0.051; wR factor = 0.152; data-to-parameter ratio = 27.3. The piperidin-4-one ring in the title compound, C26H26Cl2N2O, exists in a chair conformation with equatorial orientations of the methyl and 4-chlorophenyl groups. The C atom bonded to the oxime group is statistically planar (bond-angle sum = 360.0) although the C—C N bond angles are very different [117.83 (15) and 127.59 (15)]. The dihedral angle between the chlorophenyl rings is 54.75 (4). In the crystal, molecules interact via van der Waals forces. Related literature For the synthesis and biological activity of piperidin-4-one derivatives, see: Parthiban et al. (2008). For related structure