Oxidation of Hexacyanoferrate(II) by Peroxynitrite. A Mechanistic and Kinetic Study

Martinez, E.; Mucientes, A.; Poblete, F.; Rodriguez, A.

Artykuł - szczegóły

Tytuł artykułu

Oxidation of Hexacyanoferrate(II) by Peroxynitrite. A Mechanistic and Kinetic Study

Autorzy

Martinez E. , Mucientes A. , Poblete F. , Rodriguez A.

Identyfikatory

Warianty tytułu

Języki publikacji

Abstrakty

Akinetic study of the oxidation of hexacyanoferrate(II) by peroxynitrite has been carried out, using a stopped-flow technique. The variation of the experimental rate constant over a wide concentration range of Fe(CN)6 4 has been investigated under different experimental conditions in terms of pH, ionic strength and temperature. Acorrelation between kexp and the substrate concentration has been obtained and this shows first-order behavior in substrate at high concentrations of Fe(CN)6 4 .Areaction mechanism is proposed, in which the hexacyanoferrate(II) reacts in competitive pathways with the peroxynitrous acid (direct oxidation) and with HOź and źNO2 radicals formed in the homolysis of the peroxide bond ofHOONO(indirect oxidation). Moreover, two individual constants, kc (the formation constant of the germinated radical pair [HOź źNO2]) and k7 (direct oxidation constant), have been evaluated together with the thermodynamic parameters of these elementary steps.

Słowa kluczowe

oxidation peroxynitrite hexacyanoferrate(II) stopped-flow

Wydawca

Polskie Towarzystwo Chemiczne

Czasopismo

Polish Journal of Chemistry

Rocznik

2004

Tom

Vol. 78 / nr 2

Strony

261--271

Opis fizyczny

Bibliogr. 51 poz., rys.

Twórcy

autor

Martinez E.

Departamento de Química Física, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo José Cela, 10. E-13071-Ciudad Real, Spain

autor

Mucientes A.

Departamento de Química Física, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo José Cela, 10. E-13071-Ciudad Real, Spain

autor

Poblete F.

Departamento de Química Física, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo José Cela, 10. E-13071-Ciudad Real, Spain

autor

Rodriguez A.

Departamento de Química Física, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo José Cela, 10. E-13071-Ciudad Real, Spain

Bibliografia

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Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-article-BUJ1-0023-0168