Catalytic oxidations using cobalt(II) complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 305

In an atmosphere of dioxygen, the catalytic oxidation of 1,2-
diaminobenzene takes place in the presence of the dinuclear cobalt complex
of the 24-member macrocyclic ligand

146

. In water at 25°C the
only oxidation product is 2,3-diaminophenazine, which is formed via a
complex mechanism

OBISDIEN

-benzoquinonediimine and a
complex as intermediates. The mechanism shown in Figure 50 has been
proposed to interpret the observed kinetic behavior.

involving o