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Polycrystalline ESR spectra of the [Co(1,3-diaminopropane)3][CuCl5].3H2O complex

P. Pelikán, M. Valko, I. Kováčik, M. Mazúr, and A. Staško

Department of Physical Chemistry, Faculty of Chemical Technology, Slovak Technical University, CS-812 37 Bratislava


Abstract: The ESR spectra of the [Co(l,3-diaminopropane) 3][CuCl5]•3H2O  com­plex in polycrystalline state are the subject of the present study. Their analysis indicates the pentacoordinate configuration of the Cu(II) ion. The CuCl5 chromophore forms tetragonal pyramidal polyhedrons stabilized by the hydrogen bonds with diaminopropane (included in the complex cation). At higher temperatures (T> 160 K) a dynamic transition from tetragonal pyramidal to trigonal bipyramidal structure takes place. This transition results in a change of the ESR spectra line shape from the axial to the orthorhombic symmetry.

Full paper in Portable Document Format: 444a477.pdf


Chemical Papers 44 (4) 477–484 (1990)

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