title: 1,1'-[4-(2,4-Dichloro-phen-yl)-2,6-di-methyl-1,4-di-hydro-pyridine-3,5-di-yl]diethanone.
abstract: In the title compound, C(17)H(17)Cl(2)NO(2), the central 1,4-dihydro-pyridine ring adopts a flattened-boat conformation. The ethanone substituents of the dihydro-pyridine ring at positions 3 and 5 have synperiplanar (cis) or anti-periplanar (trans) conformations with respect to the adjacent C=C bonds in the dihydro-pyridine ring. The 2,4-dichloro-phenyl ring is almost planar [r.m.s. deviation = 0.0045 (1) Å] and almost perpendicular [89.27 (3)°] to the mean plane of the dihydro-pyridine ring. In the crystal, an N-H⋯O hydrogen bond links mol-ecules into a zigzag chain along the ac diagonal. C-H⋯Cl contacts form centrosymmetric dimers and additional weak C-H⋯O contacts further consolidate the packing.
authors.forename: J Kalyana
authors.initials: JK
authors.lastname: Sundar
authors.forename: B Palakshi
authors.initials: BP
authors.lastname: Reddy
authors.forename: V
authors.initials: V
authors.lastname: Vijayakumar
authors.forename: S
authors.initials: S
authors.lastname: Natarajan
authors.forename: J
authors.initials: J
authors.lastname: Suresh
authors.forename: P L Nilantha
authors.initials: PL
authors.lastname: Lakshman