The structures of five of the possible six isomers of (E,E)-1,4-bis(nitrophenyl)-2,3-diaza-1,3-butadiene are reported, including two polymorphs of one of the isomers. (E,E)-1,4-Bis(2-nitrophenyl)-2,3-diaza-1,3-butadiene, C14H10N4O4 (I), crystallizes in two polymorphic forms (Ia) and (Ib) in which the molecules lie across centres of inversion in space groups P21/n and P21/c, respectively: the molecules in (Ia) and (Ib) are linked into chains by aromatic π...π stacking interactions and C—H...π(arene) hydrogen bonds, respectively. Molecules of (E,E)-1-(2-nitrophenyl)-4-(3-nitrophenyl)-2,3-diaza-1,3-butadiene (II) are linked into sheets by two independent C—H...O hydrogen bonds. The molecules of (E,E)-1,4-bis(3-nitrophenyl)-2,3-diaza-1,3-butadiene (III) lie across inversion centres in the space group P21/n, and a combination of a C—H...O hydrogen bond and a π...π stacking interaction links the molecules into sheets. A total of four independent C—H...O hydrogen bonds link the molecules of (E,E)-1-(3-nitrophenyl)-4-(4-nitrophenyl)-2,3-diaza-1,3-butadiene (IV) into sheets. In (E,E)-1,4-bis(4-nitrophenyl)-2,3-diaza-1,3-butadiene (V) the molecules, which lie across centres of inversion in the space group P21/n, are linked by just two independent C—H...O hydrogen bonds into a three-dimensional framework.
报告了(E,E)-1,4-双(硝基苯基)-2,3-二氮杂-1,3-丁二烯可能存在的六种异构体中五种异构体的结构,包括其中一种异构体的两种多晶型。(E,E)-1,4-双(2-硝基苯基)-2,3-二氮杂-1,3-丁二烯,C14H10N4O4 (I),以两种多晶型态 (Ia) 和 (Ib) 结晶,其中分子分别位于空间群 P21/n 和 P21/c 的反转中心:(Ia) 和 (Ib) 中的分子通过芳香 π 连接成链。.π堆叠相互作用和 C-H...π(炔)氢键分别连接成链。(E,E)-1-(2-硝基苯基)-4-(3-硝基苯基)-2,3-二氮杂-1,3-丁二烯 (II) 分子通过两个独立的 C-H...O 氢键连接成薄片。(E,E)-1,4-双(3-硝基苯基)-2,3-二氮杂-1,3-丁二烯(III)的分子位于空间群 P21/n 的反转中心,C-H...O 氢键和 π...π 堆积相互作用将分子连接成片状。共有四个独立的 C-H...O 氢键将(E,E)-1-(3-硝基苯基)-4-(4-硝基苯基)-2,3-二氮杂-1,3-丁二烯 (IV) 分子连接成片状。在(E,E)-1,4-双(4-硝基苯基)-2,3-二氮杂-1,3-丁二烯(V)中,分子位于空间群 P21/n 的反转中心上,通过两个独立的 C-H...O 氢键连接成一个三维框架。