作者:Konstantin Troshin、Herbert Mayr
DOI:10.1021/jo302766k
日期:2013.3.15
the quoted correlation equation when both types of leaving groups were used to determine the electrofugality parameters Ef. As 1,3-diarylalyl cations are generated faster in solvolysis reactions and also react faster with nucleophiles than benzhydrylium ions of similar thermodynamic stabilities, i.e., Lewis acidities, one can conclude that the reactions involving 1,3-diarylallyl cations proceed with lower
已经在各种溶剂中测定了不同取代的1,3-二芳基烯丙基卤化物和羧酸盐的杂解速率常数k1。发现线性自由能关系log k1 = sf(Nf + Ef)可以预测1,3-二芳基烯丙基衍生物的杂解率(log k1),标准偏差为0.26,对应k1的因数为1.82,最大k1的因数偏差为5。但是,一些系统偏差是明显的。因此,当使用两种类型的离去基团确定电离性参数Ef时,1,3-二芳基烯丙基羧酸盐的反应总是更快,而1,3-二芳基烯丙基氯化物的反应总是更慢。作为1