The six isomeric N-(iodophenyl)nitrophthalimides, C14H7IN2O4, have been synthesized and the structures of five of them are reported. In N-(4-iodophenyl)-4-nitrophthalimide [(I), orthorhombic P212121] the molecules are linked into sheets by a combination of four independent C—H...O hydrogen bonds, but I...O interactions are absent. The isomers N-(3-iodophenyl)-4-nitrophthalimide [(II), monoclinic P21/c] and N-(2-iodophenyl)-4-nitrophthalimide [(III), monoclinic P21/n] both form sheets, but in (II) the molecules are linked by a combination of one two-centre iodo...nitro interaction and one C—H...O hydrogen bond into sheets containing R_4^4(30) rings, while in (III) they are linked by an iodo...carbonyl interaction and a C—H...O hydrogen bond into sheets or R_4^4(26) rings. Three-dimensional supramolecular structures are formed in both N-(4-iodophenyl)-3-nitrophthalimide [(IV), monoclinic P21/n] and N-(3-iodophenyl)-3-nitrophthalimide [(V), orthorhombic, P212121]. In (IV) the molecules are linked by a three-centre iodo...nitro interaction, three C—H...O hydrogen bonds and an aromatic π...π stacking interaction, but the framework in (V) is generated by a two-centre iodo...nitro interaction and only two C—H...O hydrogen bonds: aromatic π...π stacking interactions are absent from (V).
我们合成了六种异构体 N-(碘苯基)硝基邻苯二甲酰亚胺(C14H7IN2O4),并报告了其中五种的结构。在 N-(4-碘苯基)-4-硝基邻苯二甲酰亚胺[(I),正交 P212121]中,分子通过四个独立的 C-H...O 氢键组合连接成片状,但不存在 I...O 相互作用。同分异构体 N-(3-碘苯基)-4-硝基邻苯二甲酰亚胺[(II),单斜 P21/c]和 N-(2-碘苯基)-4-硝基邻苯二甲酰亚胺[(III),单斜 P21/n]都形成薄片,但在(II)中,分子通过一个双中心碘....硝基相互作用和一个 C-H...O氢键连接成含有 R_4^4(30)环的薄片,而在(III)中,它们通过一个碘...羰基相互作用和一个 C-H...O氢键连接成薄片或 R_4^4(26)环。在 N-(4-碘苯基)-3-硝基邻苯二甲酰亚胺[(IV),单斜 P21/n]和 N-(3-碘苯基)-3-硝基邻苯二甲酰亚胺[(V),正交 P2121]中都形成了三维超分子结构。在(IV)中,分子通过三中心碘......硝基相互作用、三个 C-H......O氢键和一个芳香族π......π堆积相互作用连接在一起,但(V)中的框架是由两个中心碘......硝基相互作用和仅两个 C-H......O氢键产生的:(V)中不存在芳香族π......π堆积相互作用。