DFT calculations at different levels of theory indicate consistently that in the presence of 1-butyl-3-methylimidazolium cations, a 1,3-dipolar cycloaddition between gem-chloronitroethene and (Z)-C-4-methoxyphenyl-N-phenylnitrone is expected to take place much faster than under ‘conventional’ conditions, the one-step mechanism being replaced by a two-step mechanism involving a zwitterionic intermediate
在不同理论
水平上的DFT计算一致地表明,在存在1-丁基-3-甲基
咪唑鎓阳离子的情况下,预期在宝石-
氯硝基乙烯和(Z)-C -4-
甲氧基苯基-N-苯基硝基之间进行1,3-偶极环加成与发生在“常规”条件下相比,发生的速度要快得多,一步机制被涉及两性离子中间体的两步机制所取代。