Kinetics of Pd(II)-Catalyzed Oxidation of Ampicillin by Using Cu(Bipy)2
2+ as Oxidant in Alkaline Medium: A Spectrophotometric Study
作者:Rupam Yadav、Jaya Srivastava、Brijesh Kumar Prajapati、Rakesh Patel、Shahla Rahmani
DOI:10.14233/ajchem.2022.23898
日期:——
unaffected by changing ionic strength of the medium while with dielectric constant, it shows inverse relation. Various thermodynamic properties of reaction were calculated such as activation energy, activation entropy, etc. Oxophenyl acetic acid and 2-formyl-5,5-dimethylthiazolidine-4-carboxylic acid were identified as reaction product. With the help of kinetic observation, spectrophotometric data an
在碱性介质中,在 35 ± 0.1 ℃ 下进行了 Cu(Bipy)2 2+ 均相 Pd(II) 催化氧化氨苄西林的动力学和机理研究。分光光度滴定显示反应的化学计量为1:4([氨苄西林]:[Cu(Bipy)2 2+] = 1:4)。然而,[Cu(Bipy)2 2+] 和 [Pd(II)] 观察到一级动力学,但低于 [OH–] 所表现出的一级动力学。改变[氨苄西林]和[联吡啶]时,反应速度保持不变。反应速率不受介质离子强度变化的影响,而与介电常数呈反比关系。计算了反应的各种热力学性质,如活化能、活化熵等。确定反应产物为氧代苯乙酸和2-甲酰基-5,5-二甲基噻唑烷-4-甲酸。借助动力学观察、分光光度数据,推导出上述反应的适当反应机理和速率定律。