The Ferraquinone-Ferrahydroquinone Couple: Combining Quinonic and Metal-Based Reactivity.

A ferraquinone-ferrahydroquinone organometallic redox couple was prepared and characterized. Intricate cooperativity of the metal was observed with different positions on the ligand. This allowed cooperative activation of small molecules like molecular hydrogen, oxygen, and bromine. Likewise, dehydrogenation of alcohols was achieved through 1,6 metal-ligand cooperation.