Synthesis, Spectroscopic, And Biological Studies Of Complexes Of Unsymmetrical Thiosemicarbohydrazide Ligand

A new unsymmetrical p-fluorobenzaldehyde derivative of α-benzilmonoximethiosemicarbohydrazide (HBMTSpFB) ligand is prepared via condensation of α-benzilmonoximethiosemicarbohydrazide and p-fluorobenzaldehyde in the 1:1 ratio. Metal complexes of Fe(II), Co(II), Cu(II), Zn(II), Hg(II) and Ni(II) have been prepared. These prepared compounds were characterized by physicochemical study, PMR, FT(IR), electronic absorption, and magnetic moment, and the purity of the HBMTSpFB ligand was analyzed by thin layer chromatography study. All prepared compounds are color-solid, air-stable, and soluble in common organic solvents. On the basis of elemental analysis metal to ligand and stoichiometry is 1:2 ratio for all complexes. Comparison of the FT(IR) spectra of the HBMTSpFB ligand and its trivalent metal complexes confirm that the HBMTSpFB ligand is a monobasic, tridentate ligand towards the central trivalent metal ion with an ONS and sequence.