Synthesis and spectroscopic studies of ternary metal complexes of isonitrosoacetophenone [hpgaldox] and anthranilic acid [haa] and their antimicrobial Activity against standard strains of eschercia Coli and staphylococcus aureus

Abstract

Mixed ligand complexes formulated as M(Pgaldox)(AA),(M=Mn(II),Co(II),Ni(II),Cu(II),Zn(II)andCd(II) where Pgaldox and AA represent the deprotonated ligands while Cr(III) complex can be formulated as Cr(Pgaldox )(AA) Cl have been synthesized and characterized by elemental analysis ,molar conductance ,magnetic susceptibility,electronic, PMR and IR spectra.The molar conductancevalues,measured in nitrobenzene solution at 10^-3   M concentration  are quite low  indicating their non-electrolytic nature .The magnetic moments and electronic spectra indicate octahedral geometry for Cr (III) and  Ni(II) complexes and tetrahedral  geometry for Co (II)complexes.The reflectance spectrum of Cu(Pgaldox) (AA) exhibits a broad band near 14925 cm^-1. .The nature and position of the band suggests that it is due to d-d transitions and may envelope two or more absorption bands in a distorted octahedral  Cu(II) environment .The non-transition mixed ligand complexes Zn(Pgaldox) (AA) and Cd(Pgaldox) (AA)show intra –ligand  and charge transfer transitions .The Co(II) complex exhibited antibacterial activity against  gram negative E.Coli and gram positive S.Aureus.