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Stereo sensitivity of exchange interactions in NiII and CuII heterospin complexes with 5-formylpyrrolyl-substituted nitroxides

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Abstract

5-Formylpyrrolyl-substituted nitronyl and imino nitroxide radicals HL1 and HL2 were synthesized. Their solid phases are formed by packing pairs of the molecules. In the {HL1...HL1} pairs, the dominant interaction is the ferromagnetic exchange with J/kB = 8.8 K (Hamiltonian \(H = 2J\left( {\overrightarrow {{s_1}} \overrightarrow {{s_2}} } \right)\)). The ferromagnetic exchange occurs also in the heterospin molecules [Ni(L1)2], [Cu(L1)2], and [Ni(L2)2(MeOH)2]. In the complexes [Ni(L1)2] and [Cu(L1)2], a small change in the mutual orientation of the coordinated ligands has a considerable effect on the value and the sign of the energy of exchange interactions between the unpaired electrons of the metal ion and paramagnetic ligands.

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Authors and Affiliations

  1. Kazan National Technological University, 68 ul. K. Marksa, 420015, Kazan, Russian Federation

    E. M. Zueva

  2. International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090, Novosibirsk, Russian Federation

    E. V. Tretyakov, S. V. Fokin, G. V. Romanenko, A. O. Tkacheva, A. S. Bogomyakov & V. I. Ovcharenko

  3. A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 ul. Favorskogo, 664033, Irkutsk, Russian Federation

    O. V. Petrova & B. A. Trofimov

  4. Kazan (Volga region) Federal University, 18 ul. Kremlevskaya, 420008, Kazan, Russian Federation

    R. Z. Sagdeev

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  1. E. M. Zueva
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  2. E. V. Tretyakov
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  3. S. V. Fokin
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  4. G. V. Romanenko
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  5. A. O. Tkacheva
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  6. A. S. Bogomyakov
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  7. O. V. Petrova
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  8. B. A. Trofimov
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  9. R. Z. Sagdeev
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  10. V. I. Ovcharenko
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Correspondence to V. I. Ovcharenko.

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Dedicated to Academician of the Russian Academy of Sciences V. M. Novotortsev on the occasion of his 70th birthday.

Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 0666–0674, March, 2016.

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Zueva, E.M., Tretyakov, E.V., Fokin, S.V. et al. Stereo sensitivity of exchange interactions in NiII and CuII heterospin complexes with 5-formylpyrrolyl-substituted nitroxides. Russ Chem Bull 65, 666–674 (2016). https://doi.org/10.1007/s11172-016-1353-8

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  • DOI: https://doi.org/10.1007/s11172-016-1353-8

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