fulltext.study @t Gmail

Kinetics of ruthenium(III)-catalysed oxidation of paracetamol by diperiodatonickelate(IV) in aqueous alkaline medium (stopped flow technique)

Paper ID Volume ID Publish Year Pages File Format Full-Text
44473 46033 2006 8 PDF Available
Title
Kinetics of ruthenium(III)-catalysed oxidation of paracetamol by diperiodatonickelate(IV) in aqueous alkaline medium (stopped flow technique)
Abstract

The kinetics of ruthenium(III)-catalysed oxidation of paracetamol by diperiodatonickelate(IV) (DPN) in aqueous alkaline medium at a constant ionic strength of 1.0 mol dm−3 was studied spectrophotometrically using a rapid kinetic accessory. The reaction exhibits 1:2 stoichiometry (DPN:paracetamol). The reaction shows first order dependence on [DPN] and [ruthenium(III)] and (apparent) less than unit order in both [paracetamol] and [alkali] under the experimental conditions. However, the order in [paracetamol] and [alkali] changes from first order to zero order as the concentrations change from lower to higher concentrations. Addition of periodate has a retarding effect on the reaction. The effects of added products, ionic strength and dielectric constant of the reaction medium have been investigated. The main products were identified by spot test, IR and NMR. A mechanism involving the monoperiodatonickelate(IV) (MPN) as the reactive species of the oxidant has been proposed. The active species of ruthenium(III) is understood as [Ru(H2O)5OH]2+. The reaction constants involved in the different steps of mechanism are calculated. The activation parameters with respect to the slow step of the mechanism are computed and discussed and thermodynamic quantities are also calculated.

Keywords
Kinetics; DPN; Oxidation; Paracetamol; Ruthenium(III) catalysis
First Page Preview
Kinetics of ruthenium(III)-catalysed oxidation of paracetamol by diperiodatonickelate(IV) in aqueous alkaline medium (stopped flow technique)
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 314, Issue 2, 9 November 2006, Pages 208–215
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us