Catalytic oxidations using cobalt(II) complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 306

306 L.I. Simándi

7.2 Oxidation of miscellaneous substrates

The derivatives of the dicobalt(III) OBISDIEN
complex, formed under O 2 atmosphere may also bind a bridging substrate,
such as oxalic 147,148 or ketomalonic 149 acid and subsequently undergo intra-
molecular redox reaction with substrate oxidation. Other substrates studied
in the OBISDIEN-dicobalt-dioxygen system included phosphonoformic
acid, malonic acid, ethylenediamine, glycine, catechols and others 150 . The
size-fit relationship is important for the formation of the dioxygen complex
containing the bridging substrate and for the redox reaction to occur. The
substrate becomes oxidized only after it forms the reactive intermediate
complex.