Another widely accepted mechanism, which can be designated as ECEC processes, is that an anion resulting from one-electron reduction undergoes a chemical reaction which often involves CO-loss to produce a daughter product. But this daughter product essentially retains a core of {Fe2S2} and may be reduced at a potential more positive than that of the first reduction [10], [30], [31] and [32]. Although there may be some controversies in defining exact pathways for chemical processes involved either right after the first reduction or the second reduction, the ECEC pattern for this electrochemistry is highly agreeable.