X-Ray K-absorption spectral investigations of some copper(II) complexes involving metal-metal interaction

Abstract

The X-ray K-absorption edge position and the extended fine structure of copper in some copper(II) complexes involving metal-metal exchange interaction have been investigated using a 40-cm bent-crystal spectrograph. The present observations do not support the hypothesis of increasing edge shift as a consequence of metal–metal interaction. Edge widths have been correlated with the co-ordination stoicheiometries, and it has also been found that the edge position shifts towards higher energy as the metal–metal distance decreases. Estimates of average metal–ligand bond distances have also been made.