The syntheses of polyamines containing two or three 2,2’-(bisamino)diphenyl ether units linked together, designed for self-assembly following lithiation, are reported. The X-ray crystal structures of two of the bis[2,2’(bisamido)diphenyl ethers] are described. The ligand, which is linked by an ethylene glycol spacer, exhibits a coiled conformation constrained by intramolecular hydrogen bonds and supplemented by [CH-Ï] interactinos. The ligand, which is linked by a more rigid bridge, containing a paraphenylene unit, displays a stretched conformation stabilised by intramolecular hydrogen bonds and intramolecular T-type aromatic-aromatic edge-to-face interactions.
报道了含有两个或三个2,2'-(双
氨基)
二苯醚单元的聚胺的合成,这些聚胺设计用于在
锂化后自组装。描述了两种双[2,2'-(双酰胺)
二苯醚]的X射线晶体结构。该
配体由
乙二醇间隔连接,呈现出受内部分子氢键约束的卷曲构象,并辅以[CH-π]相互作用。另一个
配体由更刚性的桥连接,含有对苯基单元,显示出由内部分子氢键和内部分子T型芳香-芳香边缘对面的相互作用稳定的拉伸构象。