Processes Involving Redox of a Ligand

The reaction between cobaIt(u) and pyridine-2-aldoxime takes place in several steps. The initial rapid complex formation is followed by a rate-determining redox reaction where oxidation of the cobalt(n) by the ligand provides a route to an inert cobalt(ra) species. The mode of reaction of some chromium(iii)-bound pyrazine radicals with cobalt(iii) complexes has been clarified. In the reaction shown in equation (3) the green complexed radicals formed have been 

Wieghardt, H. Cohen, and D. Meyerstein, Angew. Chem. Internal. Edn., 1978,17,608. 

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