Autoxidation pathways of CoII-complexes of pyridyl-containing pentamines involving dioxygen complexes as intermediates

Abstract

Because of the lack of a low energy pathway for the extension of conjugation in the dioxygen adduct of the cobalt(II) complex of the Pentamine, 2,6-bis[2-(3,6-diazahexyl)]pyridine, its autoxidation reaction involves displacement of peroxide and is thus fundamentally different from the dehydrogenation reactions of analogous cobalt dioxygen complexes formed from the pentamine ligands 1,9-bis(2-pyridyl)-2,5,8-triazanonane and 1,11-bis(2-pyridyl)-2,6,10-triazaundecane.