[...] the complexes were washed with 2 mL, diethyl ether and dried over anhydrous CaCl2. 3. Results and discussion Azo ligand was orange semi-crystal, but the chelate complexes of this ligand vary in color depending on metal ion.[...] the IR spectra of complexes exhibited new non-ligand bands in the range of 560-520 cm-1 and 499-424 cm-1 assigned as и (MO) and u (MN) stretching vibrations, respectively.[...] it can be concluded that (PANR) ligand binds to the metal ions through phenolic oxygen and nitrogen of azo group and the ligand behaves as mono negative bidentate ligand [21-23]. The 13C NMR spectrum of the ligand displayed characteristic signals at 148.6 ppm and at 168.6 and 178 ppm due to>(C-py pyridine ring) and (> C-OH naphthol ring) azo ligand, respectively [27].[...] the ligand spectrum showed another peaks in the regions of 99, 107.3, 129.6 and 140.8 ppm due to aromatic carbon atoms. 3.6. Electronic spectra Electronic spectra provide the most detailed information about electronic structure. According to these results, the structural formulas of this ligand and chelate complexes can be proposed as in Figure 8 Conclusions In the current study we had explored the synthesis and coordination chemistry of some monomeric complexes obtained from the reaction of the didentate azo ligand PANR with some metal ions.