IR spectroscopic study of some oxine transition metal complexes

Abstract

The IR absorption spectra of oxine and their transition metal (Mn++, Co++, Ni++, Cu++, Zn++, Cr++, Cr+++ and Fe+++) complexes were recorded in the region 200 to 2000 cm−1 and are discussed. It can be assumed that the transition metal oxine complexes are of higher symmetry and hence only two metal-ligand (ML) bands appear. The intensity of the ML bands was calculated by computer. It was found that the intensity of these bands forms the sequence: Mn++ Zn++, which is the same as that for a tetrahedral high spin CFSE.