作者:Yassien M. Temerk、Mostafa M. Kamal、Mohamed E. Ahmed
DOI:10.1039/p29840000337
日期:——
The rates of hydrolysis of a series of substituted benzylidenesalicylohydrazide derivatives in 40%(v/v) ethanol–buffer mixture have been investigated by differential pulse polarography. The hydrolysis is catalysed by H+ and its rate follows strictly first-order kinetics. The rate constant decreases with increasing pH up to around pH 3.9, beyond which no measurable reaction was observed; here the protonation
通过微分脉冲极谱法研究了一系列取代的亚苄基水杨酰肼衍生物在40%(v / v)乙醇-缓冲液混合物中的水解速率。水解由H +催化,其速率严格遵循一级动力学。速率常数随着pH的增加而降低,直至达到3.9左右,超过此值则未观察到可测量的反应。在这里,亚胺的质子化开始明显不完全。水在质子化基质上的侵蚀被认为是决定速率的步骤。报道了pH,分子结构和温度对反应速率和活化能的影响。热力学参数(ΔG ‡,ΔH ‡和ΔS ‡)进行了水解。