Kinetics and mechanism of the anilinolysis of dimethyl and diethyl chloro(thiono)phosphates
作者:Nilay Kumar Dey、Md. Ehtesham Ul Hoque、Chan Kyung Kim、Bon-Su Lee、Hai Whang Lee
DOI:10.1002/poc.1314
日期:2008.7
diethyl chlorophosphate (3) and diethyl chlorothionophosphate (4) in acetonitrile at 55.0 °C. The obtained kH/kD values are 0.798–0.979, 0.945–1.06, 0.714–0.919 and 1.01–1.10 for 1, 2, 3 and 4, respectively. A concerted mechanism with dominant backside nucleophilic attack is proposed for the reactions of 1 and 3. A concerted mechanism involving partial frontside attack through a hydrogen-bonded four-centre-type
据报道,氘化苯胺亲核试剂(XC 6 H 4 ND 2)的氘动力学同位素效应(KIEs)用于二甲基氯磷酸盐(1),二甲基氯硫代磷酸盐(2),二乙基氯磷酸酯(3)和二乙基氯硫代磷酸酯(4)的反应。乙腈在55.0°C下。将所得到的ķ ħ / ķ d值是0.798-0.979,0.945-1.06,0.714-0.919和1.01-1.10为1,2,3和4, 分别。针对1和3的反应提出了具有显着的背面亲核攻击的协同机制。针对2和4的反应,提出了一种通过氢键键合的四中心过渡态(TS)参与部分正面攻击的协同机制。版权所有©2008 John Wiley&Sons,Ltd.