4′-(4-Chlorophenyl)-1′-methyldispiro[indan-2,2′-pyrrolidine-3′,2"-indan]-1,3,1"-trione

In the title compound, C27H20ClNO3, the two cyclopentane rings adopt envelope conformations. The pyrrolidine ring also adopts an envelope conformation (with the spiro C atom as the flap) and its least-squares plane (fitted to five atoms) makes dihedral angles of 66.50 (9), 77.36 (8) and 73.76 (8)degrees with the chlorobenzene ring and the two 2,3-dihydro-1H-indene ring systems, respectively. The molecular conformation is stabilized by an intramolecular C-H center dot center dot center dot O hydrogen bond, which generates an S( 6) ring motif. In the crystal, molecules are linked by C-H center dot center dot O hydrogen bonds into chains running parallel to the [001] direction.