the first-order dependence on the concentrations of Schiff base ligands and are accelerated with the addition of water to solvent. Apparent second-order rate constant (at 25°C) and activation parameters (Δ H ≠ and Δ S ≠ ) are 7.52 M −1 s −1 , 49.8±3.2 kJ mol −1 , and −61.0±11.0 J K −1 mol −1 , respectively. On the basis of these results, the reaction mechanisms will be discussed.
摘要研究了三齿席夫碱
配体[N-(2-羟基-苯基)
水杨
亚胺及其衍
生物]在UO 2(acac)2 thf(acac =
乙酰丙酮酸酯,thf =
四氢呋喃)中对acac的取代反应动力学。 。发现反应速率显示出对席夫碱
配体的浓度的一级依赖性,并且通过将
水添加到溶剂中而加速。表观二阶速率常数(在25°C时)和激活参数(ΔH≠和ΔS≠)为7.52 M -1 s -1,49.8±3.2 kJ mol -1和-61.0±11.0 JK -1 mol -1。基于这些结果,将讨论反应机理。