Synthesis and Spectral Characterization of Metal Complexes of 1-(2-Hydroxy-4-methylphenylazo)-2-naphtho

Abstract

The o,o′-dihydroxyazo dye, 1-(2-hydroxy-4-methylphenylazo)-2-naphthol (HMPAN), and its metal complexes (chromium, cobalt, and iron) having the ligand to metal ratio 2:1 have been synthesized, but manganese forms a 1:1 complex. The spectral characterization of HMPAN and its complexes by IR, UV-VIS, 1H and 13C NMR spectroscopic techniques, and elemental analyses are reported.