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Mn(V)(O) versus Cr(V)(O) Porphyrinoid Complexes: Structural Characterization and Implications for Basicity Controlling H‑Atom Abstraction

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posted on 02.09.2015, 00:00 by Regina A. Baglia, Katharine A. Prokop-Prigge, Heather M. Neu, Maxime A. Siegler, David P. Goldberg
Isomorphous crystals of MnV(O) and CrV(O) corrolazines were characterized by single crystal X-ray diffraction. Reactivity studies with H atom donors and separated PCET reagents show a dramatic difference in H atom abstracting abilities for these two complexes. The implied large difference in driving force is opposite the trend in redox potentials, indicating that basicity is a key factor in determining the striking difference in reactivity for two metal-oxo species in identical ligand environments.