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A kinetic study of the permanganate oxidation of triethylamine. Catalysis by soluble colloids
Author(s) -
PerezBenito Joaquin F.,
Arias Conchita
Publication year - 1991
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550230806
Subject(s) - chemistry , permanganate , triethylamine , autocatalysis , manganese , catalysis , inorganic chemistry , colloid , aqueous solution , adsorption , kinetics , phosphate , organic chemistry , physics , quantum mechanics
The kinetics of the reaction between permanganate ion and triethylamine in aqueous phosphate buffers (pH 6–8) has been studied. The reaction is autocatalytic, a soluble form of colloidal manganese dioxide temporarily stabilized in solution by adsorption of phosphate ions on its surface having been identified as the autocatalyst. The reaction is also catalyzed by gum arabic. Mechanisms in agreement with the kinetic data are proposed for the reaction pathways taking place in the bulk solution (for both triethylamine and triethylammonium ion as reductants) and on both the gum arabic and manganese dioxide colloidal particles.