Sc3+-Triggered Oxoiron(IV) Formation from O2 and its Non-Heme Iron(II) Precursor via a Sc3+–Peroxo–Fe3+ Intermediate
| Autor: | Eckard Münck, Lawrence Que, Katlyn K. Meier, Feifei Li, Katherine M. Van Heuvelen |
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| Rok vydání: | 2013 |
| Předmět: |
Extramural
chemistry.chemical_element Electron donor General Chemistry Photochemistry Biochemistry Medicinal chemistry Oxygen Article Catalysis Adduct chemistry.chemical_compound Colloid and Surface Chemistry chemistry Organometallic Compounds Ferrous Compounds Non heme iron Lewis acids and bases Scandium Bond cleavage Group 2 organometallic chemistry |
| Zdroj: | Journal of the American Chemical Society. 135:10198-10201 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja402645y |
| Popis: | We report that redox-inactive Sc(3+) can trigger O2 activation by the Fe(II)(TMC) center (TMC = tetramethylcyclam) to generate the corresponding oxoiron(IV) complex in the presence of BPh4(-) as an electron donor. To model a possible intermediate in the above reaction, we generated an unprecedented Sc(3+) adduct of [Fe(III)(η(2)-O2)(TMC)](+) by an alternative route, which was found to have an Fe(3+)-(μ-η(2):η(2)-peroxo)-Sc(3+) core and to convert to the oxoiron(IV) complex. These results have important implications for the role a Lewis acid can play in facilitating O-O bond cleavage during the course of O2 activation at non-heme iron centers. |
| Databáze: | OpenAIRE |
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