Synthesis and Characterisation of Transition Metal Complexes with new Schiff base Ligand

Abstract

A new hexadentate Schiff base ligand derived from condensation of 4-aminoantipyrine with isophthaldehyde and thiosemicarbazide, and its metal complexes were characterized by elemental analyses, molar conductance, magnetic susceptibility measurement and spectral ( IR, Uv-Vis,¹H NMR, Mass, EPR) studies. It has been originated that the Schiff base ligand with Co (II), Ni (II),Cu (II) and  Zn (II) ions from mononuclear complexes on  1 : 1 (metal : ligand) stoichiometry. The conductivity data confirm the electrolytic nature of the complexes. The Co (II), Ni (II), and Zn (II) complexes show an octahedral configuration. Electronic absorption spectra of the Cu (II) complex suggest a square- planar geometry around the central metal ion. The IR spectral data suggest the involvement of sulphur and azomethine nitrogen in coordination to the central metal ion. The synthesized complexes have been subjected to antimicrobial study. The antimicrobial results indicated that the antimicrobialactivity of thecomplexesshow theenhanced activity in comparison to free ligand.These findings are giving suitable support for developing new antimicrobial agent and expand our scope for applications.