Copper and Silver Catalysed Oxidation of Glycinatopentaaminecobalt(III) by Potassium Perdisulphate

Department of Chemistry, Utkal University, Bhubaneswar- 751-004

The kinetlcs of oxidation of glycinatopentaaminecobalt(III) ion was investigated at 60° And 1 mol dm^-3 perchlorate medium. The reaction is first order in [complex] and fractional order (0.5) in [peroxydisulphate]. Slight rate retardation is observed when [H⁺]  increases from 0.1 to 0.7 mol dm^-2. The products of the reaction are Co^II, HCHO, CO₂, and NH\(_4^+\). The reaction is catalysed by Ag^I and Cu^ll, It is presumed that these catalysts produce species of their higher oxidation states which are more effective than peroxydisulphate. Increase in rate constants in presence or catalysts under nitrogen atmosphere is observed.