Kinetics and mechanism of uncatalysed and ruthenium(III)-catalysed oxidation of d-panthenol by alkaline permanganate
作者:Rajeshwari V. Hosahalli、Anita P. Savanur、Sharanappa T. Nandibewoor、Shivamurti A. Chimatadar
DOI:10.1007/s11243-009-9319-4
日期:2010.3
The oxidation of d-panthenol by MnO4− was studied in the absence and in the presence of ruthenium(III) catalyst in alkaline medium at 298 K and at constant ionic strength of 0.50 mol dm−3 by spectrophotometry. The stoichiometry in both the cases was [panthenol]: [MnO4−] = 1:4. The oxidation products were identified by IR and GC–MS. The reaction was first-order with respect to both MnO4− and ruthenium(III)
通过分光光度法研究了在碱性介质中,在 298 K 和 0.50 mol dm-3 恒定离子强度下,在没有和存在钌 (III) 催化剂的情况下,MnO4- 对 d-泛醇的氧化。两种情况下的化学计量为 [泛醇]: [MnO4-] = 1:4。氧化产物通过 IR 和 GC-MS 进行鉴定。MnO4- 和钌(III) 的反应是一级反应,而泛醇和碱的反应顺序随着浓度的增加从一级到零级变化。研究了添加产物、离子强度和介电常数的影响。计算未催化和催化反应的反应常数、活化参数和热力学量。