SYNTHESIS, X-RAY CRYSTAL STRUCTURES, AND ANTIBACTERIAL ACTIVITY OF ZINC(II) AND COPPER(II) COMPLEXES DERIVED FROM N,N′-BIS(5-METHYLSALICYLIDENE)-1,3-PROPANEDIAMINE

New phenolate and azide bridged tetranuclear zinc(II) complex [Zn4Br2L2(mu(1,1)-N-3)(2)] (1) and new mononuclear copper(II) complex [CuL] (2), where L is the dianionic form of N,N '-bis(5-methylsalicylidene)-1,3-propanediamine (H2L), are synthesized and characterized. The complexes are characterized by elemental analyses, IR, UV-Vis spectra, molar conductivity, and single crystal X-ray diffraction. X-ray analysis indicates that the Zn atoms in complex 1 are in tetrahedral and square pyramidal coordinations, and the Cu atom in complex 2 is in a tetrahedral distorted square planar coordination. In the crystal structures of the complexes, molecules are stacked through pi MIDLINE HORIZONTAL ELLIPSIS pi interactions. The complexes are assayed for antibacterial activities against three gram-positive bacterial strains (E. cloacae, E. cloacae, and St. faecalis) and three gram-negative bacterial strains (St. faecalis, P. aeruginosa, and E. cloacae) by the MTT method.