r-2,c-6-Bis(4-chloro­phen­yl)-t-3-isopropyl-1-nitro­sopiperidin-4-one

In the title mol­ecule, C(20)H(20)Cl(2)N(2)O(2), the piperidine ring adopts a chair conformation and the nitroso group at position 1 has a bis­ectional orientation. The two benzene rings and the isopropyl group attached to the piperidine ring in positions 2, 6 and 3, respectively, have axial orientations. The dihedral angle between the two benzene rings is 21.56 (13)°. One of the Cl atoms is disordered over two positions in a 0.281 (5):0.719 (5) ratio. In the crystal structure, mol­ecules are linked by C—H⋯O hydrogen bonds and a short C—H⋯O contact occurs within the mol­ecule.