Kinetics of Oxidation of Antimony(III) by Tetrachloroaurate(III) in Aqueous Hydrochloric Acid Media

Babshet, R M; Gokavi, Gavisiddappa S.

doi:10.1515/irm-2001-0108

Cited by 3 publications

(4 citation statements)

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“…Antimony in combination with oxidants like aurate(III) and 12‐phosphomolybdate has also been used in hydrogenation of alkenes 27 and oxidation of ascorbic acid 28. Therefore, in continuation of our study 29 on oxidation of antimony(III) we herein report the results of reaction between 12‐tungstocobaltate(III) and antimony(III).…”

Section: Introductionmentioning

confidence: 87%

Kinetics and mechanism of oxidation of antimony(III) by keggin‐type 12‐tungstocobaltate(III) in aqueous hydrochloric acid medium

Bhosale

Gokavi

2002

Int J of Chemical Kinetics

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The reaction between Sb(III) and [Co III W 12 O 40 ] 5− proceeds with two, one-electron steps; formation of unstable Sb(IV) is the slow first step followed by its reaction with another oxidant in a fast step. The reaction rate is unaffected by the [H + ] as there are no protonation equlibria involved with both the reactants, whereas the accelerating effect of chloride ion is due to the formation of an active chlorocomplex of the reductant, SbCl 6 3− . Increase in the ionic strength and decrease in the relative permittivity of the medium increases the rate of the reaction, which is attributed to the formation of an outer-sphere complex between the reactants. The activation parameters were also determined and these values support the proposed mechanism.

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Section: Introductionmentioning

confidence: 87%

Kinetics and mechanism of oxidation of antimony(III) by keggin‐type 12‐tungstocobaltate(III) in aqueous hydrochloric acid medium

Bhosale

Gokavi

2002

Int J of Chemical Kinetics

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“…Under the experimental conditions, the active species of oxidant and reductant were found to be HAuC1 4 and TIC1 2 -respectively. Kinetics of the oxidation of different compounds of nitrogen 17 -19 • phosphorous 20 , arsenic 21 , antimony 22 , and sulphur2 4 by gold(III) have been studied spectrophotometrically in hydrochloric acid medium. The reaction of hydrazinium ion N 2 H 5 -r with Auiii 17 is first order in both [Au 111 ] and [N 2 H 5 +j.…”

Section: (Ii)mentioning

confidence: 99%

“…Babshet and Gokavi 22 reported the kinetics of oxiqation of antimony(III) by gold(III) in (0.64-3.0) mol dm-3 hydrochloric acid. The reaction involves the following equilibria (20)(21)(22)(23) and the slow complementary two electron transfer between AuCI 3 (0Ht and SbCt 6 3-(24).…”

Section: Scheme3mentioning

confidence: 99%

Electron Transfer Reactions Between Chloroaurate(III) Complexes and Various Inorganic and Organic Reducing Agents in Acid Medium — A Brief Review

Pal¹,

Sen²,

Gupta³

2007

ChemInform

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“…Apart from the above therapeutic use, the redox properties of Au(III)-Au(I) couple have also been utilized for catalytic appilcations [4]. Reduction of gold(III) either to the metallic state or to gold(I) have been investigated [5][6][7][8][9][10][11][12][13][14] kinetically while oxidation [15] of gold(I) is scarce. The reason may be due to the disproportionation of gold(I) that is catalyzed by the surfaces [7] of the container.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and mechanism of oxidation of aurate(I) by peroxydisulphate in aqueous hydrochloric acid

Babshet

Gokavi

2002

Int J of Chemical Kinetics

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The reaction between Au(I), generated by reaction of thallium(I) with Au(III), and peroxydisulphate was studied in 5 mol dm −3 hydrochloric acid. The reaction proceeds with the formation of an ion-pair between peroxydisulphate and chloride ion as the Michealis-Menten plot was linear with intercept. The ion-pair thus formed oxidizes AuCl 2 − in a slow two-electron transfer step without any formation of free radicals. The ion-pair formation constant and the rate constant for the slow step were determined as 113 ± 20 dm −3 mol −1 and 5.0 ± 1.0 × 10 −2 dm 3 mol −1 s −1 , respectively. The reaction was retarded by hydrogen ion, and formation of unreactive protonated form of the reductant, HAuCl 2 , causes the rate inhibition. From the hydrogen ion dependence of the reaction rate, the protonation constant was calculated to be as 0.6 ± 0.1 dm 3 mol −1 . The activation parameters were determined and the values support the proposed mechanism.

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Kinetics of Oxidation of Antimony(III) by Tetrachloroaurate(III) in Aqueous Hydrochloric Acid Media

Cited by 3 publications

References 0 publications

Kinetics and mechanism of oxidation of antimony(III) by keggin‐type 12‐tungstocobaltate(III) in aqueous hydrochloric acid medium

Kinetics and mechanism of oxidation of antimony(III) by keggin‐type 12‐tungstocobaltate(III) in aqueous hydrochloric acid medium

Electron Transfer Reactions Between Chloroaurate(III) Complexes and Various Inorganic and Organic Reducing Agents in Acid Medium — A Brief Review

Kinetics and mechanism of oxidation of aurate(I) by peroxydisulphate in aqueous hydrochloric acid

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