Catalytic oxidations using cobalt(II) complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 289

Formation of the aldehyde product requires a reaction between
and in which the latter is attacked in its mesomeric form with the
unpaired electron at one of the olefinic carbon atoms. The
alkylperoxocobaloxime(III) formed will decompose to the aldehyde
probably via a dioxetane intermediate. The required protons are derived from
the water present in ordinary benzene. The proposed reaction mechanism is
depicted in Figure 30
4.5 Oxygen insertions
4.5.1 Oxygen insertion to terminal P, C and N atoms
Cobaloxime(II) catalyzes formal O-atom insertion into triphenylphos-
phine, alkyl isocyanides and nitrosobenzene 58,59 :