作者:Konstantin Troshin、Claus Schindele、Herbert Mayr
DOI:10.1021/jo201668w
日期:2011.11.18
Kinetics of the reactions of nine symmetrically substituted 1,3-diarylallyl cations with different nucleophiles were studied photometrically in dichloromethane, acetonitrile, and DMSO solutions. The second-order rate constants k2 were found to follow the correlation log k2 = sN(N + E). The electrophilicity parameters E of the title cations were derived, using the known values of sN and N of the nucleophilic
在二氯甲烷,乙腈和DMSO溶液中,以光度法研究了9个对称取代的1,3-二芳基烯丙基阳离子与不同亲核试剂的反应动力学。发现二阶速率常数k 2遵循相关对数k 2=s N(N + E)。使用亲核反应伙伴的s N和N的已知值,得出标题阳离子的亲电参数E,并将其与类似取代的苯甲基铵离子的亲电性进行比较。在亲电性之间发现良好的线性相关性E和烯丙基阳离子的量子化学计算的气相甲基阴离子亲和力和取代基X的σ +常数。