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Number of results

Journal

2009 | 7 | 4 | 929-937

Article title

Mechanistic aspects of oxidation on L-tyrosine by diperiodatocuprate(III) complex in alkali media: a kinetic model

Content

Title variants

Languages of publication

EN

Abstracts

EN
Oxidation of an amino acid, L-tyrosine (L-Tyr) by diperiodatocuprate(III) (DPC) in alkaline medium at a constant ionic strength of 0.1 mol dm−3 was studied spectrophotometrically at different temperatures (288.1–313.1 K). The reaction between DPC and L-Tyr in alkaline medium exhibits 1:4 stoichiometry (L-Tyr:DPC). Intervention of free radicals was observed in the reaction. Based on the observed orders and experimental evidence, a mechanism involving monoperiodatocuprate(III) (MPC) as the reactive oxidant species has been proposed. A suitable mechanism is proposed through the formation of a complex and free radical intermediate. The products were identified by spot test and characterized by spectral 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 are discussed. The thermodynamic quantities were determined for different equilibrium steps. Isokinetic temperature was also calculated and found to be 252.3 K. [...]

Publisher

Journal

Year

Volume

7

Issue

4

Pages

929-937

Physical description

Dates

published
1 - 12 - 2009
online
6 - 10 - 2009

Contributors

  • P.G. Department of Studies in Chemistry, Karnatak University, 580 003, Dharwad, India
author
  • P.G. Department of Studies in Chemistry, Karnatak University, 580 003, Dharwad, India
  • P.G. Department of Studies in Chemistry, Karnatak University, 580 003, Dharwad, India

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11532-009-0085-0
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