NOVEL IMIDAZOLIUM BENZIMIDAZOLATE INNER SALTS CONTAINING PENTAMETHYLENE AND POLYETHER INTERANNULAR SPACERS - SYNTHESIS AND STRUCTURAL ASPECTS

For several analogues of heterocyclic betaines 2 and 3, the high dipol ar character, due to terminal rings with extreme characteristics withi n heteroaromatic systems, and the nature of the linkers, had a dominan t influence upon their physico-chemical properties in solution. Their structural features enhanced non-covalent interactions inducing coiled conformations.