Abstract
The far-infrared spectra of metal chelates of oxine-like ligands, 2, 3-dimethyl-5-hydroxyquinoxaline, 1-hydroxyphenazine, 6-hydroxybenzo [a] phenazine, 8-hydroxybenzo [a] phenazine and 11-hydroxybenzo [a] phenazine, with divalent metal ions (Co2+, Ni2+, Cu2+, and Zn2+) are investigated. The metal-oxygen stretching bands have been assigned tentatively to the 294-219cm-1. Structure of these metal chelates have been proposed from the magnetic moments, the number of metal-oxygen stretching bands and the spectral pattern in the 600-400 cm-1 region. The structure of copper chelates, except for 11-hydroxybenzo [a] phenazine copper chelate, is trans square planar. The relationship between the M-O stretching band and atomic number of central metal has been discussed.
