meta-substituted diurea 5 exhibited helical-conformation in its crystalstructure. The way of crystal packing of 4 is analogous to that of the corresponding dicarboxylic acid derivative 2. A water cluster of a chair-shaped hexagonal array of water molecules was created in the crystalstructure of 4. Diureas 1 and 2 gave cocrystals with melamine recrystallized from DMF/ethyl acetate and DMF/H2O, respectively
Phenylenediurea二苯甲酸衍生物1,2,3,和5和酰胺衍生物4合成,和它们的分子结构分别是S形通过单晶X-射线分析。获得1的晶体作为DMF溶剂化物,而没有获得2和3的晶体。分别在1和3和2的晶体填充物中创建了薄板和梯形结构。不同于对位取代的二脲1 - 3,其具有内消旋构型中,间位取代的二脲5在其晶体结构中表现出螺旋构象。4的晶体堆积方式类似于相应的二羧酸衍生物2的堆积方式。在4的晶体结构中形成了椅子形状的水分子六边形阵列的水簇。Diureas 1和Diureas 2分别与三聚氰胺从DMF /乙酸乙酯和DMF / H 2 O中重结晶得到共晶体。在两个共晶体中都产生了三聚氰胺的氢键网络异常的曲折带。之字形带通过H键与S形双脲连接,以提供互穿的鱼网型晶体结构。