High Coordination Polyhedra of Trivalent Rare Earth Ions

  • Jean-Claude G. Bünzli
  • Bernard Klein

Abstract

When they are bonded to multidentate ligands or to small bidentate ions, rare-earth ions can form complexes with high coordination numbers. The resulting coordination polyhedra usually possess a low symmetry. However, close scrutiny of the polytopes very often reveal that they arise from a slight distortion of a more symmetrical entity. This can be expected since the bonding of Ln(III) ions is essentially non-directional; the interesting point is that for Eu(III) compounds, the symmetry of this idealized polyhedron may be estimated from the emission spectra or, more precisely, from the crystal field splitting of the J-levels. To illustrate this point, we discuss here some examples of nitrato complexes in which the Eu(III) ion is 10-, 11-, and 12-coordinate.

Keywords

Europium Coord Nitrato Hexanitrate 

References

  1. (1).
    M. G. B. Drew, Coord. Chem. Rev, 24: 179 (1977).CrossRefGoogle Scholar
  2. (2).
    J.-C. G. Bünzli, B. Klein, G. Chapuis, and K. J. Schenk, J. inorg. nucl. Chem, 42: 1307 (1980).CrossRefGoogle Scholar
  3. (3).
    J. G. Bergman Jr. and F. A. Cotton, Inorg. Chem, 5: 1208 (1966).CrossRefGoogle Scholar
  4. (4).
    B. Klein, Ph. D. Thesis, University of Lausanne (1980).Google Scholar
  5. (5).
    J.-C. G. Bünzli, B. Klein, D. Wessner, K. J. Schenk, G. Chapuis, G. Bombieri, and G. de Paoli, Inorg. Chim. Acta, 54: L43 (1981).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Jean-Claude G. Bünzli
    • 1
  • Bernard Klein
    • 1
  1. 1.Institut de chimie minérale et analytiqueUniversité de LausanneLausanneSwitzerland

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