Kinetics of the reaction of phenyl picrates with phenoxide ions in water. Concerted or stepwise?
作者:Michael R. Crampton、Ian A. Robotham
DOI:10.1002/poc.3172
日期:2013.12
A kinetic study is reported of the exchange reactions of substituted phenoxide ions with some ring‐substituted 2,4,6‐trinitrophenyl ethers in water. The βrønsted diagrams formed by plotting log k, where k is the second‐order rate constant for reaction, versus pKa show a distinct change in slope when ΔpKa = 0 (ΔpKa being the difference in pKa values of the leaving group and nucleophile). This is consistent
动力学研究报道了取代的酚盐离子与一些环取代的2,4,6-三硝基苯基醚在水中的交换反应。通过绘制日志形成的βrønsted图ķ,其中ķ为反应二阶速率常数,相对于p ķ一个示出斜率的显着变化时ΔP ķ一个 = 0(ΔP ķ一个为P中的差ķ一个离去基团和亲核试剂的值)。这与包含离散σ加合物中间体而非协调过程的两步过程一致。根据正向和反向过程的测得的β值,已构建了总体有效电荷图。版权所有©2013 John Wiley&Sons,Ltd.