Binding of molecular oxygen by an artificial heme analogue: investigation on the formation of an Fe–tetracarbene superoxo complex
| Autor: | Mirza Cokoja, Manuel P. Högerl, Fritz E. Kühn, Stefan Haslinger, Alexander Pöthig, Valerio D'Elia, Jean-Marie Basset, Markus R. Anneser |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Models
Molecular Reducing agent Iron Dimer Molecular Conformation Oxide chemistry.chemical_element Nanotechnology Heme 010402 general chemistry 01 natural sciences Oxygen Inorganic Chemistry chemistry.chemical_compound Biomimetic Materials Polymer chemistry Biomimetic Materials/chemistry Heme/chemistry Iron/chemistry Methane/analogs {&} derivatives/chemistry Organometallic Compounds/chemistry Oxygen/chemistry Organometallic Compounds Reactivity (chemistry) Acetonitrile 010405 organic chemistry ddc 0104 chemical sciences Solvent chemistry Methane Carbene |
| Zdroj: | Dalton Transactions. 45:6449-6455 |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/c6dt00538a |
| Popis: | The dioxygen reactivity of a cyclic iron(ii) tetra-NHC-complex (NHC: N-heterocyclic carbene) is investigated. Divergent oxidation behavior is observed depending on the choice of the solvent (acetonitrile or acetone). In the first case, exposure to molecular oxygen leads to an oxygen free Fe(iii) whereas in the latter case an oxide bridged Fe(iii) dimer is formed. In acetone, an Fe(iii)-superoxide can be trapped, isolated and characterized as intermediate at low temperatures. An Fe(iii)-O-Fe(iii) dimer is formed from the Fe(iii) superoxide in acetone upon warming and the molecular structure has been revealed by single crystal X-ray diffraction. It is shown that the oxidation of the Fe(ii) complex in both solvents is a reversible process. For the regeneration of the initial Fe(ii) complex both organic and inorganic reducing agents can be used. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|