Kinetics of osmium(VIII) catalyzed oxidation of allyl alcohol by potassium bromate in aqueous acidic medium-autocatalysis in catalysis

Desai, S. M.; Halligudi, Nirmala; Nandibewoor, Sharanappa T.

doi:10.1002/(sici)1097-4601(1999)31:8<583::aid-kin8>3.0.co;2-s

Cited by 11 publications

(14 citation statements)

References 25 publications

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“…This solution was kept for 24 hours. The Ruthenium (III) concentration was assayed [21] by EDTA titration. An allowance for the amount of hydrochloric acid present in the catalyst solution was made while preparing the reaction mixtures for kinetic studies.…”

Section: Methodsmentioning

confidence: 99%

“…Potassium bromate [Br (V)] is known to be a powerful oxidizing agent with redox potentials of 1.44 V in acid medium and 0.61V in alkaline medium. It has widely been used in the oxidation of many organic compounds [17][18][19][20][21]. The bromate (BrO 3 -) species has been reported as an oxidizing agent in acidic as well as in alkaline medium [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Kinetics and Mechanism of Aquachlororuthenium (III) Catalyzed Oxidation of Tartaric Acid by Acid Bromate

Singh¹,

Singh²,

Singh³

et al. 2013

TOCATJ

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Abstract:The kinetics of the oxidation of Ru (III) catalyzed oxidation of tartaric acid by potassium bromate in aqueous perchloric acid medium at constant ionic strength was investigated in the temperature range 303-318 K. The reactions exhibit first order kinetics at low concentration of bromate, tending to zero order at high concentration. . Variation in mercuric acetate concentration, [Hg(OAc)2] and ionic strength of the medium did not bring any significant change on the rate of reaction. The first order rate constant increases with decrease in the dielectric constant of the medium. The values of rate constants observed at four different temperatures were utilized to calculate the activation parameters. Formic acid and carbon dioxide have been identified as main oxidation products of the reaction. A plausible mechanism from the results of kinetic studies, reaction stoichiometry and product analysis has been proposed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetics and Mechanism of Aquachlororuthenium (III) Catalyzed Oxidation of Tartaric Acid by Acid Bromate

Singh¹,

Singh²,

Singh³

et al. 2013

TOCATJ

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“…have been reported [15][16][17][18][19][20][21]. The reported literature followed only simple oxidation kinetics and rate law with probable mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Sodium dodecylsulphate-catalyzed hetero-aromatic nitrogen base-promoted chromium(VI) oxidation of 2-propenol to 2-propenal in aqueous media

et al. 2015

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A kinetic study of homogeneously micelle-catalyzed, hetero-aromatic Nbase (2-picolinic acid, 2,2 0 -bipyridine and 1,10-phenanthroline)-promoted oxidation of 2-propenol by chromium(VI) in sulfuric acid medium was carried out at 303 K. The pseudo first-order rate constant (k obs ) of the oxidation reaction is directly proportional to [H ? ] and [promoters], which indicates that the reaction is first order with respect to H ? and promoters. The reaction was conducted at four different temperatures from which the activation parameters were calculated. Proton nuclear magnetic resonance ( 1 H-NMR) studies were performed to detect the location of reactant molecules in nanometersized micelles. From the observed kinetic results, a suitable mechanism consistent with the rate law has been proposed. The micelles produced a catalytic effect in the entire range of sodium dodecylsulphate (SDS) concentrations used, and the effect is explained by pseudo-phase ion exchange. The combination of 2,2 0 -bipyridine (bipy) and SDS exhibited a 15-fold rate enhancement of Cr(VI) oxidation of 2-propenol to 2-propenal. Electronic supplementary material The online version of this article (Graphical Abstract Ultraviolet-visible (UV-Vis) spectrum of reaction mixture for the Cr(VI) oxidation of 2-propenol with varying solution colour at different reaction times. Right: Location of reactant molecule in the micellar pseudophase region.

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“…Cinnamyl alcohol was used in perfumery and as a deodorant. Kinetic studies on the oxidation of allyl alcohol with different oxidants such as Chloramine-T, 7,8 , potassium hexacyanoferrate(II) 9 , pyridinium fluorochromate 10 , potassium bromate 11 , acid bromate 12 , quinolinium dichromate 13 , and imidazolium dichromate 14 have been reported.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of α,β-Unsaturated Alcohols by Quinaldinium Fluorochromate

Sekar¹,

Periyasamy²

2013

ILCPA

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The kinetics of oxidation of α,β-unsaturated alcohols (allyl alcohol, Crotyl alcohol, Cinnamyl alcohol) by quinaldinium fluorochromate has been studied in aqueous acid medium at 313 K. α,β-unsaturated alcohols were converted to the corresponding acrolein, crotonaldehyde and cinnamaldehyde. The reaction is first order each in oxidant, substrate and H + . The decrease in dielectric constant of the medium increases the rate of the reaction. Increase in ionic strength by the addition of sodium perchlorate has no effect on the rate constant. There is no polymerization with acrylonitrile. The reaction has been conducted at four different temperatures and activation parameters were calculated. From the observed kinetic results a suitable mechanism consistent with rate law has been proposed. The relative reactivity order was found to be Cinnamyl alcohol > Crotyl alcohol > Allyl alcohol.

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Kinetics of osmium(VIII) catalyzed oxidation of allyl alcohol by potassium bromate in aqueous acidic medium-autocatalysis in catalysis

Cited by 11 publications

References 25 publications

Kinetics and Mechanism of Aquachlororuthenium (III) Catalyzed Oxidation of Tartaric Acid by Acid Bromate

Kinetics and Mechanism of Aquachlororuthenium (III) Catalyzed Oxidation of Tartaric Acid by Acid Bromate

Sodium dodecylsulphate-catalyzed hetero-aromatic nitrogen base-promoted chromium(VI) oxidation of 2-propenol to 2-propenal in aqueous media

Oxidation of α,β-Unsaturated Alcohols by Quinaldinium Fluorochromate

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