Abstract The paper presents the synthesis of complex combinations of Cu (II), Zn (II) and Ni (II) with Schiff bases obtained by the condensation reaction of diphenylglyoxal with 1-amino- 4-nitrobenzene (L 1)/1-amino-4-chlorobenzene (L 2)/p-anisidine (L 3) as the main ligand and 1, 10-phenanthroline as the co-ligand respectively. The characterization of newly formed complexes has been done by spectral and molar conductivity studies. The ...