Thermodynamics of the formation of intermediate complexes in the oxidation of oxalic acid by cerium (IV) and kinetics of their intramolecular redox decomposition /O. O. Voskresenskaya, N. A. Skorik

Voskresenskaya, O. O.
Электронный ресурс
Другой Автор
Skorik, N. A.
Источник
Russian journal of physical chemistry A 2015 Vol. 89, № 10. P. 1821-1827
Аннотация
The thermodynamic and kinetic characteristics of the intermediate cerium(IV) oxalate complex formed at the first stage of the oxidation of oxalic acid (H2Ox) by cerium(IV) are studied by spectrophotometry and pH potentiometry at an ionic strength I = 2, pH 0.4–1.1 of a sulfuric acid medium, and temperatures of 281.65–298.35 K. The composition, the form of organic ligands, the thermodynamic parameters of formation, and the kinetic parameters of intramolecular redox decomposition are established for this complex. A detailed scheme of the initial stages in the redox process that occurs in the Ce4+-SO42--H2Ox system is considered, and the law behind its rate and the reaction mechanism associated with this law are established.
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$a The thermodynamic and kinetic characteristics of the intermediate cerium(IV) oxalate complex formed at the first stage of the oxidation of oxalic acid (H2Ox) by cerium(IV) are studied by spectrophotometry and pH potentiometry at an ionic strength I = 2, pH 0.4–1.1 of a sulfuric acid medium, and temperatures of 281.65–298.35 K. The composition, the form of organic ligands, the thermodynamic parameters of formation, and the kinetic parameters of intramolecular redox decomposition are established for this complex. A detailed scheme of the initial stages in the redox process that occurs in the Ce4+-SO42--H2Ox system is considered, and the law behind its rate and the reaction mechanism associated with this law are established.
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статьи в журналах
Резюме
The thermodynamic and kinetic characteristics of the intermediate cerium(IV) oxalate complex formed at the first stage of the oxidation of oxalic acid (H2Ox) by cerium(IV) are studied by spectrophotometry and pH potentiometry at an ionic strength I = 2, pH 0.4–1.1 of a sulfuric acid medium, and temperatures of 281.65–298.35 K. The composition, the form of organic ligands, the thermodynamic parameters of formation, and the kinetic parameters of intramolecular redox decomposition are established for this complex. A detailed scheme of the initial stages in the redox process that occurs in the Ce4+-SO42--H2Ox system is considered, and the law behind its rate and the reaction mechanism associated with this law are established.