5′′-Benzylidene-5-chloro-1′,1′′-dimethyl-4′-phenyldispiro[indoline-3,2′-pyrrolidine-3′,3′′-piperidine]-2,4′′-dione

• Main Authors: I. S. Ahmed Farag, Adel S. Girgis, A. A. Ramadan, A. M. Moustafa, Edward R. T. Tiekink
• Format: Article
• Language: English
• Published: International Union of Crystallography 2014-01-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536813032765

The title compound, C30H28ClN3O2, features two spiro links, one connecting the piperidine and pyrrolidine rings, and the other connecting the pyrrolidine ring and indole residue. The configuration about the ethene bond is E. The piperidine ring adopts a half-chair conformation where the C atom connected to the spiro-C atom lies 0.713 (3) Å out of the plane of the remaining five atoms (r.m.s. deviation = 0.086 Å). The pyrrolidine ring has an envelope conformation with the flap atom being the methylene C atom. Centrosymmetric eight-membered {...HNCO}2 amide synthons feature in the crystal packing. These are consolidated into a three-dimensional architecture by phenyl–pyrrolidine C—H...N and chlorobenzene–pyrrolidine-bound phenyl C—H...π interactions.