Synthesis, characterization and spectroscopic properties of the hydrazodye and new hydrazodye-metal complexes

Abstract The hydrazodye (L) [disodium (7-hydroxyl-8-phenylazo-1,3-naphthalenedisulfonate)] is prepared and characterized by infrared 1 H, 13 C, NMR and UV–visible spectra. The spectral data of the ligand (L) existing predominantly in the hydrazones form. Reaction of the hydrazodye (L) with Cd 2+ , Ni 2+ , Cu 2+ and Zn 2+ chloride gave two series of metal complexes with general formula [ML 2 (OH 2 ) 2 ]2Cl and [ML 2 (caf) 2 ]2Cl. Their complexes were identified by FTIR, UV–visible spectra, 1 H, 13 C, NMR, EPR, XRD and molar conductance. The molar conductance reveals that the new series of metal complexes are non-electrolytes. The postulated octahedral structure of the obtained complexes is also proposed on spectroscopic data analysis.