作者:Markus Horn、Ludwig H. Schappele、Gabriele Lang-Wittkowski、Herbert Mayr、Armin R. Ofial
DOI:10.1002/chem.201202839
日期:2013.1.2
Rates of hydride transfer from several hydride donors to benzhydrylium ions have been measured at 20 °C and used for the determination of empirical nucleophilicity parameters N and sN according to the linear free energy relationship log k20 °C=sN(N+E). Comparison of the rate constants of hydride abstraction by tritylium ions with those calculated from the reactivity parameters sN, N, and E showed fair
从几个氢化物供体到benzhydrylium离子氢化物转移率在20℃下被测量和用于经验亲核性参数的确定Ñ和š Ñ根据线性自由能关系日志 ķ 20℃ =小号Ñ(Ñ + Ë)。ity离子对氢化物提取速率常数与根据反应性参数s N,N和E计算得出的速率常数的比较显示出合理的一致性。因此,有可能将大量关于三苯甲烷离子氢化物提取的文献数据转化为N和相应氢化物供体的s N参数,并为氢化物供体建立覆盖20个数量级以上的反应性标度。