α-phenylbenzylamine forms the corresponding carbonium ions which may be trapped by nucleophiles. Isolated 1-cycloalkylbenzoquinoliniums (2) solvolyse but the SN1 mechanism (for five-, six-, and seven-membered rings): for the cyclobutyl case an SN2 reaction is also found.
2,4,6-三苯基吡啶与仲烷基胺可制得可分离的
吡啶鎓(
吡啶鎓被亲核试剂取代为S N 2并消除为烯烃)。与1-苯基
乙胺和α-苯基苄基胺形成的
2,4,6-三苯基吡啶鎓形成相应的碳离子,这些碳离子可能被亲核试剂捕获。分离的1-环烷基苯并
喹啉鎓盐(2)溶剂分解但具有S N 1机理(对于五元,六元和七元环):对于
环丁基,还会发现S N 2反应。