Li Cong-Ming, Ban Hong-Yan
Acta Crystallogr Sect E Struct Rep Online. 2009 Mar 28;65(Pt 4):o883. doi: 10.1107/S1600536809010435.
In the title compound, C(16)H(15)BrN(2)O(3), there are two independent mol-ecules (A and B) in the asymmetric unit. The major difference between the two mol-ecules is the dihedral angle formed by the aromatic rings [72.6 (2) and 18.8 (2)° for A and B, respectively]. The benzohydrazide groups are not planar and the mol-ecules exist in trans configurations with respect to the methyl-idene units. The mol-ecular packing is stabilized by two inter-molecular N-H⋯O hydrogen bonds, forming chains parallel to the c axis. Only the A mol-ecules of the asymmetric unit are held together by π-π inter-actions [centroid-centroid distance = 3.714 (3) Å].
在标题化合物C₁₆H₁₅BrN₂O₃中，不对称单元中有两个独立的分子（A和B）。这两个分子之间的主要差异在于芳环形成的二面角[A和B分别为72.6 (2)°和18.8 (2)°]。苯甲酰肼基团不是平面的，并且分子相对于亚甲基单元以反式构型存在。分子堆积通过两个分子间N-H⋯O氢键得以稳定，形成平行于c轴的链。只有不对称单元中的A分子通过π-π相互作用结合在一起[质心-质心距离 = 3.714 (3) Å]。
