title: Crystal structure of 2-[4(E)-2,6-bis-(4-chloro-phen-yl)-3-ethyl-piperidin-4-yl-idene]acetamide.
abstract: In the title piperidine derivative, C21H22Cl2N2O, the piperidine ring adopts a chair conformation. The chloro-phenyl rings are oriented at an angle of 45.59 (14)° with respect to each other. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds, forming C(4) chains along [100]. The chains are linked by C-H⋯O hydrogen bonds, forming sheets parallel to the ab plane. Within the sheets, there are N-H⋯π inter-actions present. The crystal studied was refined as an inversion twin.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram 608 002, India.
authors.forename: K
authors.initials: K
authors.lastname: Priya
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram 608 002, India.
authors.forename: K
authors.initials: K
authors.lastname: Saravanan
authors.affiliation: PG & Research Department of Physics, Government Arts College, Melur 625 106, India.
authors.forename: S
authors.initials: S
authors.lastname: Selvanayagam
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram 608 002, India.
authors.forename: S
authors.initials: S
authors.lastname: Kabilan
keywords: N—H⋯O hydrogen bonds; N—H⋯π inter­actions; crystal structure; piperidine derivatives