Fun Hoong-Kun, Kia Reza
X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia.
Acta Crystallogr Sect E Struct Rep Online. 2008 Sep 13;64(Pt 10):o1941-2. doi: 10.1107/S1600536808029000.
The mol-ecule of the title Schiff base compound, C(16)H(12)Br(2)F(2)N(2), lies across a crystallographic inversion centre and adopts an E configuration with respect to the azomethine C=N bonds. The imino groups are coplanar with the aromatic rings. Within the mol-ecule, the planar units are parallel, but extend in opposite directions from the dimethyl-ene bridge. An inter-esting feature of the crystal structure is the short inter-molecular Br⋯F inter-actions [3.2347 (16) Å, which is shorter than the sum of the van der Waals radii of these atoms]. These inter-actions link neighbouring mol-ecules along the c axis. The crystal structure is further stabilized by inter-molecular C-H⋯N hydrogen bonds.
标题席夫碱化合物C(16)H(12)Br(2)F(2)N(2)的分子位于一个晶体学反演中心上，且相对于偶氮甲碱C=N键采取E构型。亚氨基与芳环共面。在分子内，平面单元相互平行，但从亚甲基桥向相反方向延伸。晶体结构的一个有趣特征是短的分子间Br⋯F相互作用[3.2347 (16) Å，短于这些原子的范德华半径之和]。这些相互作用沿着c轴连接相邻分子。晶体结构通过分子间C-H⋯N氢键进一步稳定。
