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Local structure analysis of Cu(II)-diazepam complexes by ESR spectroscopy

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Abstract

CuL2X2 (L = 7-chloro-1,3-dihydro-1-methyl-5-phenyl-3H-1,4-benzodiazepin-2-one, also known as diazepam, X = Cl, Br) complexes have been prepared and investigated by ESR spectroscopy. Powder ESR spectra of these complexes suggest a planar-rhombic distorted local symmetry. The CH3Cl solutions spectra show the presence of pseudo-tetrahedral species with a 3dxy+4pz mixture ground state for the paramagnetic electron. The anisotropic spectra obtained for the Cu(II)-diazepam solution adsorbed on NaY zeolite confirm the existence of a CuN2X2 chromophore.

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Authors and Affiliations

  1. Department of Physics, “Babeş-Bolyai” University, RO-3400, Cluj-Napoca, Romania

    O. Cozar, L. David, V. Chis, C. Cosma & G. Damian

  2. Department of Chemistry, “Babeş-Bolyai” University, RO-3400, Cluj-Napoca, Romania

    E. Forisz

Authors
  1. O. Cozar
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  2. L. David
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  3. V. Chis
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  4. E. Forisz
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  5. C. Cosma
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  6. G. Damian
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Cozar, O., David, L., Chis, V. et al. Local structure analysis of Cu(II)-diazepam complexes by ESR spectroscopy. Fresenius J Anal Chem 355, 701–702 (1996). https://doi.org/10.1007/s0021663550701

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  • DOI: https://doi.org/10.1007/s0021663550701

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