Catalytic oxidations using cobalt(II) complexes - Advances in Catalytic Activation of Dioxygen by Metal Complexes - page 319

No reaction takes place in the absence of with Co(II) or in the
presence of with Co(III), which points to a cobalt-dioxygen complex
as key intermediate. It reacts with diacetyl to produce
acetyl free radicals, which in turn are converted to acetylperoxyl radicals via
reaction with

-atom from
adamantane, which constitutes the hydrocarbon activating step (Figure 67).

The latter are capable of abstracting an H

Cobalt salts have been extensively used as catalysts for the oxidation of
monoterpenes with

for the flavor and fragrance industry 189, 190,191 . The

addition of NaBr to increases the conversions of limonene (L),

( aP ) and ( bP ) in autoxidations, by dioxygen (Figure

68) 192,193 .