Synthesis and Structural Studies of Some First Row Transition Metal Complexes of N-Benzoylglycine Hydrazide

Abstract

Abstract N-Benzoylglycine hydrazide(BzGH) has been found to react with bivalent 3d-metal ions forming complexes of the types M(BzGH)2Cl2, M'(BzGH-H)2·nH2O and M' (BzGH-2H)·3H2O [M = Mn(II), Co(II), Ni(II), Cu(II) and Zn(II); M' = Co(II), Ni(II) and Cu(II); n = 1 or 2]. Molar conductance studies in 0.001 M DMSO solutions have indicated the non-ionic nature of the complexes. High-spin octahedral geometry for Mn(II), Co(II) and Ni(II) complexes has been suggested on the basis of magnetic and/or electronic spectral studies. IR spectra suggest neutral bidentate, uninegative bidentate and dinegative tridentate behaviour of the ligand in the complexes. ESR spectra of Cu(II) complexes indicate a dx2-y2 ground state of the metal atom with a very weak metal-metal interaction in Cu(BzGH-H)2·H2O and Cu(BzGH-2H)·3 H2O.