Feasible intermediate states of the DNC in the catalytic cycle, in which A, PM/PR, F, and OH were identified by resonance Raman (RR) experiments, and their DNC’s are likely in the forms presented above. Although the Peroxo, Hydroperoxo, and FH states (drawn in red frames) were not observed experimentally, they may exist for a short time and will also be studied in the current paper.