title: Crystal structure of 4'-(2-meth-oxy-quinolin-3-yl)-1'-methyl-dispiro-[indan-2,2'-pyrrolidine-3',3''-indoline]-1,3,2''-trione.
abstract: In the title compound, C30H23N3O4, the central 1-methyl-pyrrolidine ring adopts a twist conformation on the N-CH2 bond. The pyrrolidin-2-one ring of the indolin-2-one ring system also has a twist conformation on the C-C bond involving the spiro C atom and the carbonyl C atom. The five-membered ring of the indene-1,3-dione moiety has an envelope conformation with the spiro C atom as the flap. The quinoline ring system adopts an almost planar conformation (r.m.s. deviation = 0.04 Å). The mean planes of the indolin-2-one ring system, the indene-1,3-dione ring system and the the quinoline ring system are inclined to the mean plane of the central 1-methyl-pyrrolidine ring by 77.97 (7), 86.98 (7) and 46.58 (6)°, respectively. In the crystal, mol-ecules are linked via N-H⋯N hydrogen bonds, forming chains along the b axis. The chains are linked via a number of C-H⋯O hydrogen bonds, and C-H⋯π and π-π inter-actions [inter-centroid distance = 3.7404 (9) Å], forming a three-dimensional network.
authors: Department of Chemistry, School of Chemical Sciences, Bharathiar University, Coimbatore 641 046, India.
authors: Sadasivam
authors: S
authors: Mathusalini
authors: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors: Vijayan
authors: V
authors: Viswanathan
authors: Department of Chemistry, School of Chemical Sciences, Bharathiar University, Coimbatore 641 046, India.
authors: Palathurai Subramaniam
authors: PS
authors: Mohan
authors: Department of Chemistry, Chung Yuan Christian University, Chung-Li 32023, Taiwan.
authors: Chia-Her
authors: CH
authors: Lin
authors: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors: Devadasan
authors: D
authors: Velmurugan
keywords: crystal structure; hydrogen bonding; pyrrolidine; quinoline; spiro-indane; spiro-indolino