作者:Milan Mesic’,、Jari Peuralahti、Patrick Blans、James C. Fishbein
DOI:10.1021/tx000084p
日期:2000.10.1
A study of the decomposition of alpha-hydroxydialkylnitrosamines in aqueous 9% acetonitrile, with an ionic strength of 1 M (NaClO(4)), at 25 degrees C is reported. Plots of the logarithm of the buffer-independent rate constant, k(o), against pH are concave up and indicate a three-term rate law for the solvent reaction, including acid (k(H+)-, base (k(OH))-, and pH-independent (k(HOH)) terms. Secondary
报道了在25°C下9%乙腈水溶液中离子强度为1 M(NaClO(4))分解α-羟基二烷基亚硝胺的研究。不依赖于缓冲液的速率常数k(o)相对于pH的对数图呈凹形,表示溶剂反应的三项速率定律,包括酸(k(H +)-,碱(k(OH) )和pH无关的(k(HOH))项。化合物1a(N-亚硝基甲基氨基)苯基甲醇的次级α-氘同位素效应如下:k(alpha)(H)/kα(D) )分别对于k(H +)和k(OH)而言分别为1.12 +/- 0.03和1.19 +/- 0.02。普通酸(k(HA))和普通碱(k(A-)由更多酸性羧酸缓冲液催化在这项研究中获得的结构反应性和其他参数,以及它们随底物和催化剂结构的变化,