title: Crystal structure of 5''-benzyl-idene-1'-methyl-4'-phenyl-tri-spiro-[ace-naphthyl-ene-1,2'-pyrrolidine-3',1''-cyclo-hexane-3'',2'''-[1,3]dioxane]-2,6''-dione.
abstract: In the title compound, C36H31NO4, 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 flap, whereas the dioxalane and pyrrolidine rings each have a twist conformation. The cyclo-hexa-none ring assumes a boat conformation. Three intra-molecular C-H⋯O hydrogen bonds involving both ketonic O atoms as acceptors are present. In the crystal, C-H⋯O hydrogen bonds connect centrosymmetrically related mol-ecule into chains parallel to the b axis, forming rings of R 2 (2)(10)and R 2 (2)(8) graph-set motifs.
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; spiro­cyclo­hexa­nones; tris­piropyrrolidines