ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 47, Number 6
JKCSEZ 47(6)
December 20, 2003 

Cobalt oxygen carrier complex N,N'-ethylenebis(3-methoxysalycylideneiminato)cobalt(II), Co(3MeOsalen) was prepared at 25 ℃. UV and visible absorption spectra of the complex and hydrazobenzene were studied in non-aqueous solvent methanol in the range of wavelength 200-600 nm. The oxidation of hydrazobenzene by oxygen in non-aqueous solvent is catalysed by Co(3MeOsalen). In the presence of triphenylphosphine(PPh₃), the rate decreases in methanol. This is presumably attributable to the coordination of PPh₃ to the Co(3MeOsalen), resulting in the catallytically inactive compound. The initial rates of the oxidation of hydrazobenzene with the ligand triphenylphosphine were measured by the theoretical values of the rates, Rate=k₁+k₂K₁[P]/1+K₁[P]+K₁K₂[P]². This fact would be a poorer σ-donor ligand than methanol.