Reaction mechanism of cobalt(III)--polyamine complexes with OH radicals
The reaction of the cobalt(III)--polyamine complexes (Co(en)/sub 3/)/sup 3 +/, (Co(dien)/sub 2/)/sup 3 +/, (CoCl/sub 2/(trien))/sup +/ (en = ethylenediamine, dien = diethylenetriamine, trien = triethylenetetramine) with OH radicals have been investigated by conductometric pulse radiolysis in weak acid solutions. All complexes react with OH with k = (3.0 +- 0.2) x 10/sup 8/M/sup -1/s/sup -1/. The ligands are oxidized and the Co(III) is reduced to Co(II) by the oxidized ligands. The dissociation rates of the degraded and undegraded ligands are measured, and the rate constant for all complexes examined are shown to increase with increasing hydrogen ion concentration. The primary oxidation mechanisms of these complexes are discussed. 6 figures, 1 table.
- Research Organization:
- Hahn-Meitner-Institut fuer Kernforschung, Berlin, Germany
- OSTI ID:
- 6479541
- Journal Information:
- Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 18:2; ISSN INOCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COBALT COMPLEXES
COMPLEXES
DECOMPOSITION
DISPERSIONS
HYDROXYL RADICALS
IRRADIATION
KINETICS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PULSED IRRADIATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
REACTION KINETICS
SOLUTIONS
TRANSITION ELEMENT COMPLEXES