5 ''-(4-Chlorobenzylidene)-1 '-(4-chlorophenyl)-1 ''-methyl-1 ',2 ',3 ',5 ',6 ',7 ',8 ',8a '-octahydrodispiro[acenaphthylene-1,3 '-indolizine-2 ',3 ''-piperidine]-2,4''(1H)-dione

In the title compound, C37H32Cl2N2O2, the pyridinone ring adopts a twisted half-chair conformation. The fused pyrrolidine and piperidine rings of the octahydroindolizine unit exhibit envelope (with the C atom bound to the C atom bearing the chlorobenzene ring being the flap atom) and chair conformations, respectively. The dihedral angle between the chlorobenzene rings is 84.03 (1)degrees. In the crystal, C-H center dot center dot center dot pi interactions lead to supramolecular chains along [101] that assemble in the ac plane. Connections along the b axis are of the type Cl center dot center dot center dot Cl [3.4065 (8)angstrom].