Activation Parameters for Additions to Alkenes of Arylchlorocarbenes with Enhanced Electrophilicity
作者:Lei Wang、Karsten Krogh-Jespersen、Robert A. Moss
DOI:10.1021/acs.joc.5b01210
日期:2015.8.7
Activation parameters are reported for additions of phenylchlorocarbene (PhCCl), pentafluorophenylchlorocarbene (F5-PhCCl), and 3,5-dinitrophenyl-chlorocarbene (3,5-DN-PhCCl) to tetramethylethylene (TME), cyclohexene, and 1-hexene. The order of activation enthalpies is F5-PhCCl > PhCCl > 3,5-DN-PhCCl. Activation enthalpies also increase as the degree of alkene alkylation decreases. In general, the
报道了向四甲基乙烯(TME),环己烯和1-己烯中添加苯基氯卡宾(PhCCl),五氟苯基氯卡宾(F 5 -PhCCl)和3,5-二硝基苯基-氯卡宾(3,5-DN-PhCCl)的活化参数。活化焓的顺序为F 5 -PhCCl> PhCCl> 3,5-DN-PhCCl。活化焓也随着烯烃烷基化程度的降低而增加。通常,激活熵随激活焓的增加而增加。