scholarly journals A kinetic and mechanistic study of the osmium(VIII)-catalysed oxidation of crotyl alcohol by hexacyanoferrate(III) in aqueous Alkaline medium

2020 ◽  
Vol 44 (5-6) ◽  
pp. 295-300
Author(s):  
Priyamvada Sharma ◽  
Riya Sailani ◽  
Anita Meena ◽  
Chandra Lata Khandelwal
Keyword(s):  
Reaction Mechanism ◽  
Alkaline Medium ◽  
Activation Parameters ◽  
Mechanistic Study ◽  
Aqueous Alkaline Medium ◽  
Crotyl Alcohol ◽  
Catalysed Oxidation ◽  
Entropy Of Activation ◽  
Eyring Equation

The kinetics and mechanism of the osmium(VIII)-catalysed oxidation of crotyl alcohol by hexacyanoferrate(III) in aqueous alkaline medium is studied. The role of the osmium(VIII) catalyst is delineated to account for the experimental observations. A plausible reaction mechanism is suggested. Activation parameters such as the energy and entropy of activation are evaluated by employing the Eyring equation and are found to be 36.833 kJ mol−1 and −141.518 J K−1 mol−1, respectively.

scholarly journals Kinetics and Mechanistic Study of the Ruthenium(III) Catalysed Oxidative Decarboxylation of L-Proline by Alkaline Heptavalent Manganese (Stopped flow technique)

2005 ◽  
Vol 2 (1) ◽  
pp. 91-100 ◽  
Author(s):  
R. S. Shettar ◽  
M. I. Hiremath ◽  
S. T. Nandibewoor
Keyword(s):  
Ionic Strength ◽  
Alkaline Medium ◽  
Activation Parameters ◽  
Solvent Polarity ◽  
Mechanistic Study ◽  
Slow Step ◽  
Oxidative Decarboxylation ◽  
Reaction Products ◽  
Order Dependence ◽  
Catalysed Oxidation

The kinetics of ruthenium(III) catalysed oxidation of L-Proline by permanganate in alkaline medium at a constant ionic strength has been studied spectrophotometrically using a rapid kinetic accessory. The reaction between permanganate and L-Proline in alkaline medium exhibits 2:1 stoichiometry (KMnO4: L-Proline). The reaction shows first order dependence on [permanganate] and [ruthenium(III)] and apparent less than unit order dependence each in L-Proline and alkali concentrations. Reaction rate increases with increase in ionic strength and decrease in solvent polarity of the medium. Initial addition of reaction products did not affect the rate significantly. A mechanism involving the formation of a complex between catalyst and substrate has been proposed. The activation parameters were computed with respect to the slow step of the mechanism and discussed

Kinetic and Mechanistic Study of Oxidative Degradation of Paracetamol by Diperiodatonickelate (IV) in Aqueous Alkaline Medium

2002 ◽  
Vol 2002 (4) ◽  
pp. 147-148 ◽  
Author(s):  
R.M. Kulkarni ◽  
D.C. Bilehal ◽  
S.T. Nandibewoor
Keyword(s):  
Alkaline Medium ◽  
Oxidative Degradation ◽  
Activation Parameters ◽  
Reactive Species ◽  
Mechanistic Study ◽  
Slow Step ◽  
Aqueous Alkaline Medium ◽  
Reaction Constants

A mechanism involving the monoperiodatonickelate (IV) (MPN) as the reactive species of the oxidant has been proposed. The reaction constants involved in the different steps of the mechanism are calculated. The activation parameters with respect to the slow step of the mechanism are computed and discussed.

Mechanistic Study of the Oxidation of Isonicotinate ion by Diperiodatocuprate(III) in Aqueous Alkaline Medium

2005 ◽  
Vol 2005 (3) ◽  
pp. 197-201 ◽  
Author(s):  
G.C Hiremath ◽  
R.M Mulla ◽  
S.T Nandibewoor
Keyword(s):  
Ionic Strength ◽  
Alkaline Medium ◽  
Activation Parameters ◽  
Mechanistic Study ◽  
Slow Step ◽  
Thermodynamic Quantities ◽  
Aqueous Alkaline Medium ◽  
Kinetics Of Oxidation ◽  
Reaction Constants ◽  
Kinetics Of

The kinetics of oxidation of isonicotinate ion by diperiodatocuprate(III) (DPC) in aqueous alkaline medium at a constant ionic strength of 0.60 mol dm−3 was studied spectrophotometrically. A mechanism involving the formation of an intermediate complex between the diperiodatocuprate(III) as the oxidant species and isonicotinate ion is proposed. The reaction constants involved in the different steps of mechanism have been calculated. The activation parameters with respect to the slow step of the mechanism have been computed and discussed and thermodynamic quantities were also determined.

scholarly journals Mechanistic Study on the Oxidation of 4-Hydroxycoumarin by Diperiodatonickelate(IV) in Aqueous Alkaline Medium

2009 ◽  
Vol 6 (3) ◽  
pp. 601-610 ◽  
Author(s):  
Ramesh S. Shettar ◽  
Nagaraj P. Shetti ◽  
Sharanappa T. Nandibewoor
Keyword(s):  
Alkaline Medium ◽  
Activation Parameters ◽  
Spot Test ◽  
Mechanistic Study ◽  
Slow Step ◽  
Thermodynamic Quantities ◽  
Aqueous Alkaline Medium ◽  
First Order ◽  
Rate Determining Step ◽  
Reaction Constants

The oxidation of 4-hydroxycoumarin (HDC) by diperiodato- nickelate(IV) (DPN) in aqueous alkaline medium at a constant ionic strength of 1.0 mol dm-3was studied spectrophotometrically at 298 K. The reaction between DPN and 4-hydroxycoumarin in alkaline medium exhibits 1:3 stoichiometry (HDC: DPN). The reaction is of first order in [DPN] and has less than unit order in [HDC] and fractional order in [alkali]. The oxidation reaction in alkaline medium has been shown to proceed via a DPN- 4-hydroxycoumarin complex, which decomposes slowly in a rate-determining step followed by other fast steps to give the products. The main products were identified by spot test, IR,1HNMR studies. The reaction constants involved in the different steps of the mechanism were calculated. The activation parameters with respect to slow step of the mechanism were computed and discussed and thermodynamic quantities were also determined.

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