Four macrocyclic Schiff base ligands (L1, L2, L3, and L4) have been prepared. In the presence of Copper(II), original macrocycles were converted to the three new binuclear polymeric complexes [Cu2L2 1′](NO3)2, [Cu2L2 2′](NO3), and [Cu2L2 3′](NO3)2. But in the presence of Nickel(II), macrocyclic rings remained unchanged and Schiff base complexes of [NiL1(CH3CN)2(CH3OH)2] (ClO4)2 and [NiL4](NO3)2 were synthesized. All ligands and their related complexes were characterized by elemental analysis, IR spectroscopy, in the case of ligands 1H, 13C NMR and EI-Mass and for [Cu2L2′](NO3)2 and [NiL1(CH3CN)2(CH3OH)2](ClO4)2 complexes X-ray crystal structure determination have been performed. Crystal structure showed 1D zigzag polymer for [Cu2L2 1′](NO3)2 and macrocyclic structure for [NiL1(CH3CN)2(CH3OH)2] (ClO4)2 complexes. The ligands and related polymericcomplexes were screened for their antibacterial activities against six bacterial strains and the complexes showed antibacterial effects.
