Spectra of Some Rh(III)- and Ir(III)-Complex Compounds

  • Hans-Herbert Schmidtke
Conference paper


During the last two years a series of Rh(III)- and Ir(III)-compounds have been prepared by us and spectroscopically investigated. Some of them have been known for a long time, but the spectra in the visible and UV range were not recorded; others are entirely new. For all of them the spectrum together with modern theoretical procedures can give some insight in the chemical bonding, charge distribution and certain other properties. Furthermore it is possible from visible and U V spectroscopy to assign the steric isomers in the case of low symmetry complexes. This has its theoretical foundations in the results of YAMATERA (1) and McCLURE (2), who investigated the energy level splittings of non cubic complex ions by means of crystal field and MO theory. It is known that bands in UV and visible spectra can be divided in ligand field bands, charge transfer bands (ctf) from the ligand to the central ion or in opposite direction, and in bands belonging essentially to the perturbed electronic system of the ligands. All these transitions are found in the spectra of the compounds investigated here, however, as can be seen from the table the classification is no longer so clearcut for low symmetry complexes.


Charge Transfer Band Thiourea Complex RACAH Parameter Energy Level Splitting Spectrochemical Series 
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Copyright information

© Springer-Verlag Wien 1964

Authors and Affiliations

  • Hans-Herbert Schmidtke
    • 1
  1. 1.Cyanamid European Research InstituteCologny (Geneva)Switzerland

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