Collect. Czech. Chem. Commun. 1997, 62, 729-738

Effect of Concentrated Uni-Univalent Electrolytes on Oxidation Kinetics of Sulfur of Chelate Ligands in Co(III) Complexes with H2O2, IO4- and S2O82-

Oľga Vollárová and Ján Benko

Department of Physical Chemistry, Comenius University, 842 15 Bratislava, Slovak Republic


The effect of concentrated uni-univalent electrolytes on the oxidation kinetics of sulfur in the chelate ligands (-SCH2CH2NH2-)-, (-SOCH2CH2NH2-)-, (-SCH2COO-)2-, and (-SOCH2COO-)2- bound in Co(III) complexes with various oxidants (H2O2, IO4-, S2O82- has been studied at 298.2 K. The results show that the changes observed in the rate constants are due to interactions between the supporting electrolyte and solvent.

Keywords: Kinetic salt effect; Thiolato ligands; Sulfenato ligands; Oxidation; Co(III) chelates.