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The Cu(II) complexes with bis(pyrazole-1-yl)methane and its derivatives: Synthesis, crystal structure, and magnetic properties

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Abstract

The procedures for the synthesis of the Cu(II) complexes with bis(pyrazole-1-yl)methane (L1), bis(3,5-dimethyl-4-bromopyrazole-1-yl)methane (L2), and bis(3,5-dimethyl-4-iodopyrazole-1-yl)methane (L3) of the composition Cu2(L1)2Br4 (I), Cu2(L2)2Cl4 (II), Cu(L3)(NO3)2 (III), and Cu(L3)(H2O)(NO3)2 · 2H2O (IV) were developed. The organic ligands in the above complexes are coordinated to Cu(II) in a bidentate cyclic type through the N(2), N(2′) atoms of the pyrazole rings. The molecular and crystal structures of L2, L3, II, III, and IV were determined by X-ray diffraction. The study of the μeff(T) function in a temperature interval 2–300 K showed that compound I, which exhibited ferromagnetic exchange interactions in the chains, undergoes transition to antiferromagnetic state with weak ferromagnetism. The exchange antiferromagnetic interactions predominate in compound II.

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Authors and Affiliations

  1. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia

    E. V. Lider, E. V. Peresypkina, A. I. Smolentsev, Yu. G. Shvedenkov & L. G. Lavrenova

  2. Institute of Chemical Kinetics and Combustion, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia

    O. L. Krivenko

Authors
  1. E. V. Lider
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  2. O. L. Krivenko
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  3. E. V. Peresypkina
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  4. A. I. Smolentsev
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  5. Yu. G. Shvedenkov
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  6. S. F. Vasilevskii
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  7. L. G. Lavrenova
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Original Russian Text © E.V. Lider, O.L. Krivenko, E.V. Peresypkina, A.I. Smolentsev, Yu.G. Shvedenkov, S.F. Vasilevskii, L.G. Lavrenova, 2007, published in Koordinatsionnaya Khimiya, 2007, Vol. 33, No. 12, pp. 912–923.

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Lider, E.V., Krivenko, O.L., Peresypkina, E.V. et al. The Cu(II) complexes with bis(pyrazole-1-yl)methane and its derivatives: Synthesis, crystal structure, and magnetic properties. Russ J Coord Chem 33, 896–907 (2007). https://doi.org/10.1134/S1070328407120056

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  • DOI: https://doi.org/10.1134/S1070328407120056

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