Synthesis, characterization and antimicrobial studi es on Cobalt (II), Nickel (II), Copper (II) and Zinc (II) complexes of N, O, S donor Schiff bases
Abstract Biologically important Schiff bases L 1 8-nitro-2-{[(5'-methyl-3'-isoxazolyl) imino] methyl} naphtha [NMIIMN], L 2 N-[5'-methyl-3'-isoxazolyl]-N-[(E)1-(-2 Thiophene)] methylidine] amine [MITMA] have been synthesized. Metal Chelates of NMIIMN and MITMA with Co (II), Ni (II), Cu (II) and Zn (II) metals have been synthesized and the structures of these ch-elates have been elucidated by elemental analysis, 1 H _ NMR, Mass, IR electronic spectral data and magneticmoments. From these studies it is found that the ligands NMIIMN and MITMA act as bidentate ligands coordinating through oxygen and nitrogen donor atoms in the case of NMIIMN, sulpher and nitrogen atoms in the case of MITMA. The chelates of Co (II), Ni (II) and Zn (II) appear to be octahedral and Cu (II) appears to be tetragonal geometry. Antimicrobial activity of the ligands and their metal complexes against bacteria (Bacillus, Pseudomonas) and fungus (R. Solani, A. Niger) has been carried out. It...