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Czasopismo
2009 | 7 | 4 | 929-937
Tytuł artykułu

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

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
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. [...]
Słowa kluczowe
Wydawca

Czasopismo
Rocznik
Tom
7
Numer
4
Strony
929-937
Opis fizyczny
Daty
wydano
2009-12-01
online
2009-10-06
Twórcy
  • P.G. Department of Studies in Chemistry, Karnatak University, 580 003, Dharwad, India
autor
  • P.G. Department of Studies in Chemistry, Karnatak University, 580 003, Dharwad, India
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-009-0085-0
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