ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 36, Number 2
JKCSEZ 36(2)
April 20, 1992 

Tetradentate Schiff base Cobalt(Ⅱ)(3MeOSED)(H2O)2 complexe was synthesized and allowed to react with dry oxygen to form oxygen adducts of Cobalt(Ⅲ) complexes such as μ-peroxo type [Co(Ⅲ)(3MeOSED)(DMF)]2O2 and [Co(Ⅲ)(3MeOSED)(DMSO)]2O2 in DMF and DMSO or superoxo type [Co(Ⅲ)(3MeOSED)(Py)]O2 in pyridine. The oxygen adducted complex was investigated by cyclic voltammetry and DPP method with glassy carbon electrode in 0.1M TEAP-DMF (-DMSO,-Py) as supporting electrolyte solution. As a result the reduction reaction process occurred to four steps including prewave Of O₂^- in 1 : 1 oxygen adducted superoxo type [Co(Ⅲ)(3MeOSED)(Py)]O2 complex and three steps not including prewave of O2- in 1 : 2 oxygen adducted μ-peroxo type [Co(Ⅲ)-(3MeOSED)(DMF)]2O2 and [Co(Ⅲ)(3MeOSED)(DMSO)]2O2. A superoxo type [Co(Ⅲ)(3MeOSED)(L)]O2 (L: CH3OH) was generated with oxygen in methanol. Selectively oxidized hydrazobenzene (H2AB) to trans-azobenzene(t-AB) and the rate constant k for oxidation reaction of the following equation is (2.96 ± 0.2) × 10^-1M/sec. H2AB + Co (Ⅱ)(3MeOSED)(L)2+O2 ↔ [Co(Ⅲ)(3MeOSED)(L)]O2·H2AB→Co(Ⅱ(3MeOSED)(L)2+t-AB+H2O2.