Crystallographic and spectroscopic characterization of a nonheme Fe(IV)=O complex
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- Crystallographic and spectroscopic characterization of a nonheme Fe(IV)=O complex
- Rohde, Jan-Uwe; In, JH; Lim, Mi Hee; Brennessel, WW; Bukowski, MR; Stubna, A; Munck, E; Nam, W; Que, L
- Issue Date
- AMER ASSOC ADVANCEMENT SCIENCE
- SCIENCE, v.299, no.5609, pp.1037 - 1039
- Following the heme paradigm, it is often proposed that dioxygen activation by nonheme monoiron enzymes involves an iron(IV)=oxo intermediate that is responsible for the substrate oxidation step. Such a transient species has now been obtained from a synthetic complex with a nonheme macrocyclic ligand and characterized spectroscopically. Its high-resolution crystal structure reveals an iron-oxygen bond length of 1.646(3) angstroms, demonstrating that a terminal iron(IV)=oxo unit can exist in a nonporphyrin ligand environment and lending credence to proposed mechanisms of nonheme iron catalysis.
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