Kinetics and Mechanism of the Anilinolysis of Bis(N,N-dimethylamino) Phosphinic Chloride in Acetonitrile
作者:Hasi Rani Barai、Hai-Whang Lee
DOI:10.5012/bkcs.2011.32.12.4361
日期:2011.12.20
deuterated anilines () are investigated kinetically in acetonitrile at . The anilinolysis rate of 3 is rather slow to be rationalized by the conventional stereoelectronic effects. The magnitudes of (= -6.42) and (= 2.27) values are exceptionally great. The deuterium kinetic isotope effects (DKIEs; ) are secondary inverse ( = 0.69-0.96). A concerted mechanism involving a backside attack is proposed on the basis
双(N,N-二甲基氨基)氯化亚膦(3)与取代的苯胺()和氘代苯胺()的亲核取代反应在乙腈中进行了动力学研究。3 的苯胺分解速率相当慢,无法通过传统的立体电子效应合理化。(= -6.42) 和 (= 2.27) 值的幅度非常大。氘动力学同位素效应 (DKIEs;) 是二次逆 (= 0.69-0.96)。在二次逆DKIEs和X值随X的变化趋势的基础上,提出了一种涉及背面攻击的协同机制。通过DKIEs简要回顾了六种次膦酰氯在MeCN中的苯胺分解,两种配体的空间效应,正反应中心磷原子的电荷,