An Octahedral Coordination Complex of Iron(VI)
2006; American Association for the Advancement of Science; Volume: 312; Issue: 5782 Linguagem: Inglês
10.1126/science.1128506
ISSN1095-9203
AutoresJohn F. Berry, Eckhard Bill, E. Bothe, Serena DeBeer, Bernd Mienert, Frank Neese, Karl Wieghardt,
Tópico(s)Magnetism in coordination complexes
ResumoThe hexavalent state, considered to be the highest oxidation level accessible for iron, has previously been found only in the tetrahedral ferrate dianion, FeO 4 2– . 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 \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \(\mathrm{d}_{xy}^{2}\) \end{document} ground electronic configuration. The compound is stable at 77 kelvin and yields a high-spin Fe(III) species upon warming.
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