ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Influence of medium on the kinetics of oxidation of cis- and trans-bis(ethylenediamine)chloroisothiocyanatocobalt(III) ions by cerium(IV) ions and peroxodisulfate

V. Holba, V. Harčárová, and M. Tarnovská

Department of Physical Chemistry, Faculty of Natural Sciences, Komenský University, CS-842 15 Bratislava

Abstract:  The kinetics of oxidation of the cis- and trans-[Co(en)₂Cl(NCS)]⁺ ions by the cerium(IV) ions and peroxodisulfate was investigated from the view-point of the influence of supporting electrolytes and nonaqueous component of solvent. The experimental results may be only partially interpreted on the basis of electrostatic theory. There are specific interionic interactions which manifest themselves significantly in the oxidation by the cerium(IV) ions. The relative permittivity is not regulating the course of reactions in mixed solvents. The reaction mixture was analyzed by ion-exchange technique and by means of resolution of pertinent absorption bands into Gaussian components.

Full paper in Portable Document Format: 376a721.pdf

Chemical Papers 37 (6) 721–731 (1983)