In search of the spin-delocalization effect from the correlation analysis of relative rates of the trichloromethyl-bromo-addition reactions to fourteen p-Y-substituted phenylacetylenes
作者:Xi-Kui Jiang、Guo-Zhen Ji、John Rong-Yuan Xie
DOI:10.1016/0040-4020(96)00021-x
日期:1996.2
rates, i.e., , of trichloromethyl-bromo-addition reactions to fourteen p-Y-substituted phenylacetylenes (I-Y, with YF, Cl, Br, Me, t-Bu, OMe, SMe, SiMe3, CF3, CN, NO2, SOMe, COMe and CO2Me). The reaction was run in cyclohexane under nitrogen atmosphere at 65±0.5°C. All products were derived from the intermediate YC6H4CCHCCl3 adduct radicals. Correlation analysis of these rate data seems to suggest that
严格的程序用于测量相对速率,即三氯甲基溴加成反应与十四个P Y取代的苯基乙炔的相对速率(IY,具有YF,Cl,Br,Me,t-Bu,OMe ,SMe,SiMe 3,CF 3,CN,NO 2,SOMe,COMe和CO 2 Me)。将反应物在氮气氛下在环己烷65±0.5°运行Ç。所有产物从中间YC衍生6 ħ 4 CCHCCl 3加成基团。这些速率数据的相关分析似乎表明,极性和自旋离域效应都在过渡态下起作用。