Sundar J Kalyana, Reddy B Palakshi, Vijayakumar V, Natarajan S, Suresh J, Lakshman P L Nilantha
Acta Crystallogr Sect E Struct Rep Online. 2011 Jan 15;67(Pt 2):o380-1. doi: 10.1107/S1600536810052839.
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.
在标题化合物C(17)H(17)Cl(2)NO(2)中，中心的1,4-二氢吡啶环呈扁平船式构象。二氢吡啶环3位和5位的乙酮取代基相对于二氢吡啶环中相邻的C=C键具有同面共平面（顺式）或异面共平面（反式）构象。2,4-二氯苯基环几乎呈平面状[r.m.s.偏差 = 0.0045 (1) Å]，且与二氢吡啶环的平均平面几乎垂直[89.27 (3)°]。在晶体中，一个N-H⋯O氢键将分子沿ac对角线连接成锯齿链。C-H⋯Cl接触形成中心对称二聚体，额外的弱C-H⋯O接触进一步巩固了堆积。
