作者:Linoam Eliad、Shmaryahu Hoz
DOI:10.1002/poc.482
日期:2002.8
The kinetics of chlorine transfer reactions between N-chlorosuccinimide (NCS) and four carbon nucleophiles (the conjugated bases of phenyldinitromethane, Meldrum's acid, phenylmalononitrile and phenylnitro-methane) in water were determined. A plot of log k for the SN2 reactions vs the pKa of the first three conjugated acids of the nucleophiles gave a straight line with a slope (βnuc) of 1.8. The data
测定了N-氯琥珀酰亚胺(NCS)和四种碳亲核试剂(苯基二硝基甲烷,Meldrum的酸,苯基丙二腈和苯基硝基甲烷)的氯转移反应的动力学。S N 2反应的log k对亲核试剂的前三个共轭酸的p K a的曲线图给出了一条直线,斜率(βnuc)为1.8。单硝基衍生物苯基硝基甲烷的数据点与谱线的偏差为6.7 log个单位。该偏差是质子转移反应的典型现象,最近发现在S N中也发生对溴有2个反应。版权所有©2002 John Wiley&Sons,Ltd.