Metal–Ligand Cooperative Control of Reactivity in a Porphyrin Manganese(IV)–Oxo–Phenoxyl Radical Complex for Water Activation
The Oxygen Evolving Complex (OEC) is a Mn4Ca cluster at the heart of Photosystem II that catalyzes the water oxidation reaction. Recent studies suggest the formation of a Mn(IV)‐oxyl species in the OEC, accompanied by a nonbonded tyrosinyl radical in the S3′ state, prior to O─O bond formation and O2 release. In this st...