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New Iron(III) Oxo Complex with Substituted 2,6-Bis(Pyrazol-3-yl)Pyridine

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Abstract

A new binuclear iron(III) oxo complex [(L)FeOFe(L)](PO2F2)4 (1) with PO2F2– counterions resulted from the oxidation of the hexafluorophosphate anion has been prepared by oxidation of an iron(II) complex with the tridentate ligand 2,6-bis(5-(4-fluorophenyl)-1H-pyrazol-3-yl)pyridine (L). According to X-ray diffraction studies, the iron(III) ions adopt the high-spin state, as in the previously described iron(III) oxo complex with tert-butyl substituted bis(pyrazol-3-yl)pyridine. At the same time, the presence of aromatic para-fluorophenyl substituents and \({\text{P}}{{{\text{O}}}_{2}}{\text{F}}_{2}^{ - }\) counterions in oxo complex 1 decreases the twisting of bis(pyrazol-3-yl)pyridine ligands relative to each other, thus ensuring a less distorted molecular geometry of this complex.

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ACKNOWLEDGMENTS

X-ray diffraction studies of metal complexes were carried out with the support of the Ministry of Science and Higher Education of the Russian Federation using scientific equipment at the Center for Molecular Studies of the Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences.

Funding

This work was financially supported by the Russian Science Foundation (grant no. 17-13-01456).

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Authors and Affiliations

  1. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119334, Moscow, Russia

    I. A. Nikovsky, A. V. Polezhaev, E. K. Melnikova & Yu. V. Nelyubina

  2. Bauman Moscow State Technical University, 105005, Moscow, Russia

    A. V. Polezhaev

  3. Moscow State University, 119991, Moscow, Russia

    E. K. Melnikova

  4. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    Yu. V. Nelyubina

Authors
  1. I. A. Nikovsky
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  2. A. V. Polezhaev
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  3. E. K. Melnikova
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  4. Yu. V. Nelyubina
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Correspondence to Yu. V. Nelyubina.

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Translated by V. Avdeeva

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Nikovsky, I.A., Polezhaev, A.V., Melnikova, E.K. et al. New Iron(III) Oxo Complex with Substituted 2,6-Bis(Pyrazol-3-yl)Pyridine. Russ. J. Inorg. Chem. 65, 864–869 (2020). https://doi.org/10.1134/S0036023620060145

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