Kinetics and mechanism of the permanganate ion oxidation of sulfite in alkaline solutions. The nature of short-lived intermediates

Simándi, László I.; Jáky, M.; Savage, Charles R.; Schelly, Z. A.

doi:10.1021/ja00300a023

Cited by 109 publications

(59 citation statements)

References 6 publications

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“…The mechanism by which the multivalent oxidant oxidizes substrate depends not only on the substrate but also on the medium 4 used for the study. In strongly alkaline medium, the stable reduction products 5,6 of the permanganate ion (MnO 4 -) is manganate ion (MnO 4…”

Section: Introductionmentioning

confidence: 99%

Metal Ion Catalyzed Oxidation of L-Lysine by Alkaline Permanganate Ion-A Kinetic and Mechanistic Approach

Mohanty¹,

Behera²,

Acharya³

et al. 2012

Chem Sci Trans

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Abstract:The kinetics of copper(II), nickel(II) and zinc(II) catalyzed oxidation of L-lysine by potassium permanganate in alkaline medium were studied spectrophotometrically. The reaction is first order with respect to [oxidant], [substrate] and [alkali] respectively. The results suggests the formation of a complex between the amino acid and lysine and the hydroxylated species of copper(II), nickel(II) and zinc(II). The reaction constants involved in the mechanism and the activation parameters have been calculated. The reactivity order of the catalyst is Cu(II) > Ni(II) > Zn(II).

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Section: Introductionmentioning

confidence: 99%

Metal Ion Catalyzed Oxidation of L-Lysine by Alkaline Permanganate Ion-A Kinetic and Mechanistic Approach

Mohanty¹,

Behera²,

Acharya³

et al. 2012

Chem Sci Trans

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“…Under the present experimental conditions at pH > 12, the reduction product of Mn(VII) is stable and further reduction of Mn(VI) might be stopped. 17,18 However, prolong standing, green Mn(VI) is reduced to Mn(IV) under experimental conditions. The permanganate shows various oxidation states, such as Mn(VII), Mn(V), and Mn(VI) in the alkaline medium.…”

Section: Discussionmentioning

confidence: 96%

“…16 In strongly alkaline medium, permanganate ion gives the manganate ion, MnO 4 2-as the stable reduction product. [17][18][19] No mechanistic information is available to differentiate between a direct one-electron reduction to Mn(VI) and a mechanism in which a hypomanganate ion formed in a two-electron reduction followed by its rapid re-oxidation. 20,21 The multistep redox reactions are major source of information as when the manganese intermediates have sufficiently long life time, it's quite easy to identify them and the possible reaction mechanism were presumed by the oxidation states of the intermediates.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Mechanism of Permanganate Oxidation of Enrofloxacin in Aqueous Alkaline Medium

Jain¹,

Devra²

2017

J. Pharm. Sci. Innov.

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The reaction kinetics of oxidation of enrofloxacin by potassium permanganate has been investigated in aqueous alkaline medium using spectrophotometric technique at 30 ± 1°C at constant ionic strength of 0.10 mol L -1 . The reaction exhibits 2:1 stoichiometry (2 KMnO4:1 Enrofloxacin). The order with respect to oxidant and substrate is found to be unity in each, whereas fractional order with re spect to alkali concentration. The oxidation products were identified by using FTIR, LCMS spectral studies. The effects of added products, ionic strength and dielectric constant have been studied on the rate of reaction. Based on the experimental results a suitable mechanism is proposed. There is no evidence of intermediate complex formation, thus, the outer-sphere mechanism is proposed as the mechanism for this reaction.

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“…As it exhibits many oxidation states, the stoichiometric results and pH of the reaction media play important roles. Simandi et al [23,24] reported that at pH > 12, the reduction product of Mn VII is stable Mn VI and no further reduction is observed. However, on prolonged standing, the green Mn VI is reduced to Mn IV under our experimental conditions.…”

Section: Discussionmentioning

confidence: 99%

Base-Catalyzed Oxidation of Aminotriazole Derivative by Permanganate Ion in Aqueous Alkaline Medium: A Kinetic Study

Fawzy¹

2015

IJIRSET

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Kinetic investigation on the oxidation of one of the aminotriazole derivatives, namely N,N-dimethyl-N'-(4H-1,2,4-triazol-3-yl) formamidine (ATF) by permanganate ion in alkaline medium has been performed at a constant ionic strength of 0.1 mol dm -3 and at 25 o C. The progress of the reaction was followed spectrophotometrically. Both spectroscopic and kinetic evidences reveal formation of a 1:1 intermediate complex between the oxidant and substrate. The influence of pH on the oxidation rate indicated that the reaction is base-catalyzed. The reaction shows first order dependence with respect to , and fractional-first order dependences on both [ATF] and [OH -]. Increasing ionic strength and dielectric constant did not affect the reaction rate. Addition of small amounts of alkali-metal ion catalysts was found to accelerate the oxidation rate and the order of effectiveness of the ions was: Li + > Na + > K + . The final oxidation products of ATF were identified as 3-aminotriazole, dimethyl amine and carbon dioxide. A plausible reaction mechanism consistent with the kinetic observations is proposed, and the reaction constants involved in the different steps of the mechanism have been evaluated. The activation parameters with respect to the slow step of the reaction, along with thermodynamic quantities of the equilibrium constants are calculated and discussed.

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Kinetics and mechanism of the permanganate ion oxidation of sulfite in alkaline solutions. The nature of short-lived intermediates

Cited by 109 publications

References 6 publications

Metal Ion Catalyzed Oxidation of L-Lysine by Alkaline Permanganate Ion-A Kinetic and Mechanistic Approach

Metal Ion Catalyzed Oxidation of L-Lysine by Alkaline Permanganate Ion-A Kinetic and Mechanistic Approach

Kinetics and Mechanism of Permanganate Oxidation of Enrofloxacin in Aqueous Alkaline Medium

Base-Catalyzed Oxidation of Aminotriazole Derivative by Permanganate Ion in Aqueous Alkaline Medium: A Kinetic Study

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