title: Crystal structure of 5''-(4-chloro-benzyl-idene)-4'-(4-chloro-phen-yl)-1'-methyltri-spiro[acenapthylene-1,2'-pyrrolidine-3',1''-cyclo-hexane-3'',2'''-[1,3]dioxane]-2(1H),6''-dione.
abstract: In the title compound, C36H29Cl2NO4, two spiro links connect the methyl-substituted pyrrolidine ring to the ace-naphthyl-ene and cyclo-hexa-none rings. The cyclo-hexa-none ring is further connected to the dioxalane ring by a third spiro junction. The five-membered ring of the ace-naphthylen-1-one ring system adopts a flattened envelope conformation, with the ketonic C atom as the flap, whereas the dioxalane and pyrrolidine rings each have a twist conformation. The cyclo-hexenone ring assumes a boat conformation. An intra-molecular C-H⋯O hydrogen-bond inter-action is present. In the crystal, mol-ecules are linked by non-classical C-H⋯O hydrogen bonds, forming chains extending parallel to the a axis.
authors.affiliation: Research Department of Physics, S. D. N. B. Vaishnav College for Women, Chromepet, Chennai 600 044, India.
authors.forename: Kuppan
authors.initials: K
authors.lastname: Chandralekha
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Deivasigamani
authors.initials: D
authors.lastname: Gavaskar
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Adukamparai Rajukrishnan
authors.initials: AR
authors.lastname: Sureshbabu
authors.affiliation: Research Department of Physics, S. D. N. B. Vaishnav College for Women, Chromepet, Chennai 600 044, India.
authors.forename: Srinivasakannan
authors.initials: S
authors.lastname: Lakshmi
keywords: ace­naphthyl­ene; crystal structure; dioxalane; hydrogen bonding; spiro pyrrolidines