An Octahedral Coordination Complex of Iron(VI)
Abstract
The hexavalent state, considered to be the highest oxidation level accessible for iron, has previously been found only in the tetrahedral ferrate dianion, FeO42-. We report the photochemical synthesis of another Fe(VI) compound, an octahedrally coordinated dication bearing a terminal nitrido ligand. Mössbauer and x-ray absorption spectra, supported by density functional theory, are consistent with the octahedral structure having an Fe≡N triple bond of 1.57 angstroms and a singlet dxy2 ground electronic configuration. The compound is stable at 77 kelvin and yields a high-spin Fe(III) species upon warming.
- Publication:
-
Science
- Pub Date:
- June 2006
- DOI:
- 10.1126/science.1128506
- Bibcode:
- 2006Sci...312.1937B
- Keywords:
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- CHEMISTRY