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Synthesis and structure of enaminoketones of pyrazole containing 2-thione(selenone)benzimidazolyl fragments and their zinc and cadmium complexes

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Abstract

New ligand systems based on 4-formyl-5-hydroxypyrazole and 1-aminobenzimidazole derivatives are synthesized. The obtained enamines and their Zn2+ and Cd2+ metal complexes of composition ML2 were investigated using the IR, heteronuclear (1H, 13C, 15N, 77Se, 113Cd) and two-dimensional NMR spectroscopy (COSY, HSQC, HMBC). The data of physicochemical investigations and quantum-chemical calculations showed that the ligands exist in the ketoamine tautomeric form. Quantum-chemical simulation of Zn(II) and Cd(II) complexes showed that the zinc complexes adopt the pseudo-tetrahedral and the cadmium complexes pseudo-octahedral configuration.

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Authors and Affiliations

  1. Institute of Physical and Organic Chemistry, Southern Federal University, pr. Stachki 194/2, Rostov-on-Don, 344090, Russia

    I. G. Borodkina, A. S. Burlov, G. S. Borodkin, V. V. Chesnokov, T. A. Kuzmenko, A. I. Uraev, E. V. Korshunova & I. S. Vasil’chenko

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  1. I. G. Borodkina
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  2. A. S. Burlov
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  3. G. S. Borodkin
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  4. V. V. Chesnokov
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  5. T. A. Kuzmenko
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  6. A. I. Uraev
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  7. E. V. Korshunova
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  8. I. S. Vasil’chenko
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Correspondence to I. G. Borodkina.

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Original Russian Text © I.G. Borodkina, A.S. Burlov, G.S. Borodkin, V.V. Chesnokov, T.A. Kuzmenko, A.I. Uraev, E.V. Korshunova, I.S. Vasil’chenko, 2016, published in Zhurnal Obshchei Khimii, 2016, Vol. 86, No. 4, pp. 690–698.

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Borodkina, I.G., Burlov, A.S., Borodkin, G.S. et al. Synthesis and structure of enaminoketones of pyrazole containing 2-thione(selenone)benzimidazolyl fragments and their zinc and cadmium complexes. Russ J Gen Chem 86, 876–884 (2016). https://doi.org/10.1134/S1070363216040198

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  • DOI: https://doi.org/10.1134/S1070363216040198

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