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ESR study of Cu(II)-indomethacin and its pyridine and DMF adducts

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Abstract

Powder ESR spectra of [Cu2(Ind)4](H2O)2 at room temperature show the presence of copper acetate like dimers characterized by a strong antiferromagnetic exchange interaction (J≈−338 cm−1). Two different monomeric species were evidenced in 40%Py+60%DMF solution absorbed on NaY zeolite: the Cu(Ind)2(DMF)2 with an elongated tetragonal-octahedral symmetry and the Cu(Ind)2(Py)2 with a CuN2O2 chromophore in atrans square-planar arrangement. Only one monomeric species Cu(Ind)2(Py)2 was identified in 20%Py+80%DMF and 20%Py+80% Chloroform solutions. The Cu(Py)4 2+ species of CuN4 chromophore occurs in pyridine Cu(II)-indomethacin solution suggesting a decomposition of the solvit compound.

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Authors and Affiliations

  1. Department. of Physics., University of Cluj-Napoca, 3400, Cluj-Napoca, Romania

    L. David, O. Cosar, V. Chiš, A. Negoescu & I. Vlašin

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  1. L. David
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  2. O. Cosar
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  3. V. Chiš
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  4. A. Negoescu
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  5. I. Vlašin
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David, L., Cosar, O., Chiš, V. et al. ESR study of Cu(II)-indomethacin and its pyridine and DMF adducts. Appl. Magn. Reson. 6, 521–528 (1994). https://doi.org/10.1007/BF03162641

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  • DOI: https://doi.org/10.1007/BF03162641

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