Abstract
AbstractThe x‐ray L3 absorption edges of all cis‐1,2,3,4‐cyclopentanetetracarboxylic acid complexes of Gd, Tb, Dy and Ho were recorded with the help of a 400 mm Cauchois‐type bent crystal x‐ray spectrograph. The behaviour of the four lanthanide cations in the environment of the same complexing ligand was investigated. The chemical shifts were correlated with IR studies. Information regarding bonding in these complexes was obtained from the observed chemical shifts. A regular decrease was observed in the average metal—ligand bond distances with increasing atomic number of the metal ion in these complexes and this is interpreted in terms of metal—oxygen interaction.
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