Abstract
Isomer shifts of the recoilless 90 keV γ-rays of99Ru were observed in a number of octahedrally coordinated complexes of ruthenium and reveal the influence of different ligands on the electron density at the ruthenium nuclei. For a given oxidation state the observed shifts are correlated with the spectrochemical series; the backbonding properties of ligands like CN−1 and NO+ cause a considerable increase of the electron density. This behaviour is largely similar to that found for compounds of iron and some 5d elements.
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We wish to thank Dr. G. Schatz for producing the99Rh sources in the cyclotron of the Gesellschaft für Kernforschung, Karlsruhe. We are also indebted to Prof. Peacock for providing us with a sample of RuF5 and to Prof. Mathieu, who made K2[RuCl5NO] available to us.
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Potzel, W., Wagner, F.E., Zahn, U. et al. Isomer shifts and chemical bonding in ruthenium complexes. Z. Physik 240, 306–313 (1970). https://doi.org/10.1007/BF01395583
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DOI: https://doi.org/10.1007/BF01395583