Copper(II) complexes of 5-(4`-derivatives phenyl azo)-8-hydroxy-7-quinolinecarboxaldehydes were synthesized and characterized by using microanalysis, IR spectra, magnetic measurements, and thermal analysis.copper(II) complexes have square planar geometry with formula [Cu(Ln)2].5H2O.The electronic spectra of all complexes exhibits a bands at ~ 17635 -19228 and 26955-19802 cm -1 ranges, assigned to ...