Scheme 1. Proposed mechanism of the catalytic cycle for the regeneration of high spin FeIIIL2 and FeIIIL3 via high valent intermediates starting from iron(iii)-porphyrins in the presence of meta-chloroperbenzoic acid (oxidant) and ferrocene or any other one-electron donor/substrate (S) in dichloromethane at −30 °C.
