ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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)