Форум хімфаку КНУ

korendovych

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Реєстрація: 29.11.2005

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Coordination Complex of Fe(VI)

www.sciencemag.org/cgi/rapidpdf/1128506v1.pdf

An Octahedral Coordination Complex of Iron(VI)
John F. Berry,1* Eckhard Bill,1 Eberhard Bothe,1 Serena DeBeer George,2 Bernd Mienert,1 Frank Neese,1† Karl Wieghardt1‡
1Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany. 2Stanford
Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94309, USA.
*Present address: Department of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, WI 53706, USA.
†Present address: Institut für Physikalische und Theoretische Chemie, Universität Bonn, D-53115 Bonn, Germany.

The hexavalent state is considered to be the highest oxidation level accessible for iron, and has previously
been found only in the tetrahedral ferrate dianion, FeO42–.
Here 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 Ångstroms and a
singlet dxy 2 ground electronic configuration. The compound is stable at 77 Kelvin and reacts yielding a
high-spin Fe(III) species on warming.

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