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Spin State of Cobalt(II) 2,6-Bis(pyrazol-3-yl)pyridine Complex with a Redox-Active Ferrocenyl Substituent

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Abstract

The reaction of new 2,6-bis(pyrazol-3-yl)pyridine ligand (L) containing a redox-active ferrocenyl substituent with cobalt(II) salt gave the cobalt(II) complex [Co(L)2](ClO4)2 (I), which was isolated in a pure state and characterized by elemental analysis, NMR spectroscopy, cyclic voltammetry, and X-ray diffraction. According to X-ray diffraction data (CIF file CCDC no. 2049714) and the Evans method, which allows determining the spin state of paramagnetic compounds in solution on the basis of NMR spectra, the cobalt(II) ion in complex I occurs in the high-spin state and does not undergo temperature-induced spin transition in the temperature range of 120–370 K.

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ACKNOWLEDGMENTS

X-ray diffraction studies were performed using research equipment of the Center for Studies of Molecular Structure of the Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, and were supported by the Ministry of Science and Higher Education of the Russian Federation.

Funding

This study was 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, Moscow, Russia

    G. L. Denisov, I. A. Nikovskii, T. M. Aliev, A. V. Polezhaev & Yu. V. Nelyubina

  2. Bauman Moscow State Technical University, Moscow, Russia

    A. V. Polezhaev & Yu. V. Nelyubina

Authors
  1. G. L. Denisov
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  2. I. A. Nikovskii
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  3. T. M. Aliev
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  4. A. V. Polezhaev
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  5. Yu. V. Nelyubina
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Corresponding author

Correspondence to Yu. V. Nelyubina.

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The authors declare that they have no conflicts of interest.

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Translated by Z. Svitanko

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Denisov, G.L., Nikovskii, I.A., Aliev, T.M. et al. Spin State of Cobalt(II) 2,6-Bis(pyrazol-3-yl)pyridine Complex with a Redox-Active Ferrocenyl Substituent. Russ J Coord Chem 47, 480–487 (2021). https://doi.org/10.1134/S1070328421060014

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  • DOI: https://doi.org/10.1134/S1070328421060014

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