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首页> 外文期刊>Archives of Applied Science Research >Kinetics and mechanism of oxidation of nicotinic acid by potassium permanganate in aqueous acidic medium
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Kinetics and mechanism of oxidation of nicotinic acid by potassium permanganate in aqueous acidic medium

机译：高锰酸钾在酸性水溶液中氧化烟酸的动力学及机理

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The stoichiometry and kinetics of oxidation of nicotinic acid by potassium permanganate has been investigated in aqueous acidic medium at 28±1oC, I = 0.5 mol dm-3 (Na2SO4), [H+] = 1x10-1 mol dm-3. The results obeys the rate law -d[C6H5NO2]/dt = (a+b[H+])[C6H5NO2] [MnO4 -] where a = 0.016 dm3mol-1s-1, b = 1.57 dm6mol-1s-1 The rate of reaction decreased with increase in ionic strength. Added cations and anions catalysed the reaction. The result of spectroscopic and kinetic investigation did not indicate intermediate complex formation because there was no change in λmax at 525nm. A plausible mechanism has been proposed for this reaction.
机译：已经在28±1oC，I = 0.5 mol dm-3（Na2SO4），[H +] = 1x10-1 mol dm-3的酸性水溶液中研究了高锰酸钾对烟酸的化学计量和动力学。结果符合速率定律-d [C6H5NO2] / dt =（a + b [H +]）[C6H5NO2] [MnO4-]其中a = 0.016 dm3mol-1s-1，b = 1.57 dm6mol-1s-1反应随离子强度的增加而降低。加入的阳离子和阴离子催化了该反应。光谱和动力学研究的结果没有表明形成中间配合物，因为在525nm处的λmax没有变化。已经提出了对该反应的合理机制。

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