2015): Crystal structures, spectroscopic, electrochemical and antibacterial properties of a series of new copper(II) Schiff base complexes, Journal of Coordination Chemistry, Two new and two previously reported Schiff base ligands as well as four corresponding newCu(II) complexes (CuL 1-4 ) were synthesized and characterized. The Schiff base ligands were synthesized from condensation of 5-bromo-2-hydroxy-3-nitrobenzaldehyde with aliphatic (H 2 L 1-2 ) or aromatic (H 2 L 3-4 ) diamines. Crystal structures of CuL 2 and CuL 3 were determined by X-ray crystallography. Antibacterial properties of these ligands and complexes were studied against four human pathogenic bacteria. The complexes showed moderate antibacterial activities, higher than those of the ligands.