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Synthesis and magnetic properties of iron(II) closo-borate complexes with tris(3,5-dimethylpyrazol-1-yl)methane

  • XXVI International Chugaev Conference on Coordination Chemistry
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Abstract

Methods are developed for preparing iron(II) complexes with tris(3,5-dimethylpyrazol-1-yl)methane {HC(3,5-dmpz)3} and closo-borate(2-) ions, namely [Fe{HC(3,5-dmpz)3}2]B10H10 · H2O (I) and [Fe{HC(3,5-dmpz)3}2]B12H12 · H2O (II). These complexes were characterized by static magnetic susceptibility measurements (2–325 K), electronic spectroscopy (diffuse reflectance spectra), and IR spectroscopy. The complexes have a distorted octahedral geometry of the coordination polyhedron; the coordination core is FeN6. μeff(T) studies show low-temperature incomplete spin crossover in complex I and antiferromagnetic exchange coupling among iron(II) unpaired electrons at temperatures below 90 K in complex II. Complex I shows thermochromism; the color transition upon cooling is white ↔ pink.

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Authors and Affiliations

  1. Komsomolsk-on-Amur State Technical University, 27, Lenin Ave., Khabarovsk Region, 681013, Russia

    O. G. Shakirova

  2. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk, 630090, Russia

    L. G. Lavrenova

  3. Novosibirsk State University, 2, Pirogova Str., Novosibirsk, 630090, Russia

    L. G. Lavrenova

  4. International Tomography Center, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    A. S. Bogomyakov

  5. Kurnakov Institute of Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia

    K. Yu. Zhizhin & N. T. Kuznetsov

Authors
  1. O. G. Shakirova
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  2. L. G. Lavrenova
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  3. A. S. Bogomyakov
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  4. K. Yu. Zhizhin
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  5. N. T. Kuznetsov
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Corresponding author

Correspondence to O. G. Shakirova.

Additional information

Original Russian Text © O.G. Shakirova, L.G. Lavrenova, A.S. Bogomyakov, K.Yu. Zhizhin, N.T. Kuznetsov, 2015, published in Zhurnal Neorganicheskoi Khimii, 2015, Vol. 60, No. 7, pp. 869–872.

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Shakirova, O.G., Lavrenova, L.G., Bogomyakov, A.S. et al. Synthesis and magnetic properties of iron(II) closo-borate complexes with tris(3,5-dimethylpyrazol-1-yl)methane. Russ. J. Inorg. Chem. 60, 786–789 (2015). https://doi.org/10.1134/S003602361507013X

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  • DOI: https://doi.org/10.1134/S003602361507013X

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