Saraswathi B S, Foro Sabine, Gowda B Thimme
Acta Crystallogr Sect E Struct Rep Online. 2011 May 1;67(Pt 5):o1139. doi: 10.1107/S1600536811013407. Epub 2011 Apr 16.
There is one half-mol-ecule in the asymmetric unit of the title compound, C(16)H(14)Cl(2)N(2)O(2), with a center of symmetry at the mid-point of the central C-C bond. The N-H and C=O bonds in the C-NH-C(O)-C fragment are anti to each other and the amide O atom is anti to the H atoms attached to the adjacent C atoms. However, the conformation of the N-H bond in the amide fragments is syn to the ortho-chloro groups in the adjacent benzene rings. The dihedral angle between the benzene ring and the NH-C(O)-CH(2) fragment is 47.0 (2)°. In the crystal, a series of N-H⋯O inter-molecular hydrogen bonds link the mol-ecules into chains along the b axis.
标题化合物C(16)H(14)Cl(2)N(2)O(2)的不对称单元中有半个分子，在中心C-C键的中点处存在对称中心。C-NH-C(O)-C片段中的N-H键和C=O键彼此呈反式，酰胺O原子与连接在相邻C原子上的H原子呈反式。然而，酰胺片段中N-H键的构象与相邻苯环中的邻氯基团呈顺式。苯环与NH-C(O)-CH(2)片段之间的二面角为47.0 (2)°。在晶体中，一系列N-H⋯O分子间氢键将分子沿b轴连接成链。
