Synthesis and characterization of the complexes of some transition metals with 2-acetyl pyridine (N-benzoyl) glycyl hydrazone

Complexes of Mn(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II) with 2-acetyl pyridine (N-benzoyl) glycyl hydrazone(2-ApBzGH) have been synthes ized and characterized by elemental analyses, molar conductances, magnetic susceptibility, IR, electronic, ESR,H-1, C-13 and Cd-113 NMR spectral and X -ray diffraction studies. IR and NMR data suggest the tridentate nature of the ligand coordinating as a neutral species in the addition complexes and as a uninegative species in the deprotonated complexes. The presence of mor e than one isomer of the ligand has been established by 1H NMR spectra of t he ligand and complexes recorded over the 298-396 K range. The X-ray powder diffraction patterns of [Cd(2-ApBzGH)Cl]Cl and [Cu(2-ApBzGH)Cl(H2O2)]Cl ar e indexed for orthorhombic and tetragonal crystal systems respectively.