studied, and the closed forms are found to be solvatochromic due to the donor–acceptor interaction with the solvent molecules. The closed form of the imidazolium salt shows a much higher affinity towards nucleophiles over the open form of the salt. A reaction pathway has been proposed to account for this reactivity difference based on the structure–property relationship, and the possible structure
合成了一系列在
咪唑环的2位带有各种取代基的含二
噻吩基
乙烯的
咪唑鎓盐。已经研究了这些化合物的光致变色性质,并且由于给体-受体与溶剂分子的相互作用,闭合形式被发现是溶剂变色的。
咪唑鎓盐的封闭形式显示出对亲核试剂的亲和力比盐的开放形式高得多。已经提出了一种基于结构-性质关系的反应途径来解决这种反应性差异,并讨论了反应产物的可能结构。