Formation and decomposition of p-peroxo complexes

The most extensive kinetic studies on the formation of p-peroxo complexes have been performed on cobalt(II) derivatives. Stopped-flow or ordinary UV-VIS spectrophotometry is usually the method of choice for rate measurements. Generally, the kinetics of formation of p-peroxodicobaltClII) species is consistent with the 2-step reversible scheme of equations (27) and (28). 

Wilkins [314] that the oxygenation of cobalt(II) complexes is controlled by the ligand exchange process, i.e. the replacement of coordinated water (ligand) or solvent molecule by dioxygen. The rate 

Using this value, Fallab and Mitchell [309] estimate 5x10 M s for 

Aqua-hydroxo derivatives react faster with 0 than the 

Rate constants of superoxo complex formation (k for metal complexes of non-porphyrin ligands 

---