Russian Journal of Coordination Chemistry

, Volume 40, Issue 8, pp 523–530

Influence of the bridging coordination of DMSO on the exchange interaction character in the binuclear copper(II) complex with the nonsymmetrical exchange fragment

  • S. I. Levchenkov
  • I. N. Shcherbakov
  • L. D. Popov
  • V. G. Vlasenko
  • K. Yu. Suponitskii
  • A. A. Tsaturyan
  • V. V. Lukov
  • V. A. Kogan
Article

DOI: 10.1134/S1070328414080041

Cite this article as:
Levchenkov, S.I., Shcherbakov, I.N., Popov, L.D. et al. Russ J Coord Chem (2014) 40: 523. doi:10.1134/S1070328414080041

Abstract

The binuclear copper(II) complex [Cu2L(CH3COO)] (I), where L3− is the azomethine trianion based on 3-methyl-4-formyl-1-phenylpyrazol-5-one and 1,3-diaminopropan-2-ol, and its DMSO adduct (II) in which the DMSO molecule acts as an additional bridging ligand are synthesized. The structure of complex II is determined by X-ray diffraction analysis, and the structure parameters of the coordination unit of complex I are determined by EXAFS spectroscopy. The μ2-coordination of the DMSO molecule in compound II results in a change in the sign of the exchange interaction parameter. In complex I, the antiferromagnetic exchange interaction (2J = −169 cm−1) occurs between the copper(II) ions. The exchange interaction of the ferromagnetic type (2J = 174 cm−1) is observed in complex II. The quantum-chemical calculations of the magnetic exchange parameters by the density functional theory method show that the role of the DMSO molecule as a switch of the exchange interaction character is exclusively the stabilization of the “broken” conformation of the metallocycles.

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Copyright information

© Pleiades Publishing, Ltd. 2014

Authors and Affiliations

  • S. I. Levchenkov
    • 1
  • I. N. Shcherbakov
    • 2
  • L. D. Popov
    • 2
  • V. G. Vlasenko
    • 2
  • K. Yu. Suponitskii
    • 3
  • A. A. Tsaturyan
    • 2
  • V. V. Lukov
    • 2
  • V. A. Kogan
    • 2
  1. 1.Southern Scientific CenterRussian Academy of SciencesRostov-on-DonRussia
  2. 2.Southern Federal UniversityRostov-on-DonRussia
  3. 3.Nesmeyanov Institute of Organoelement CompoundsRussian Academy of SciencesMoscowRussia

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