Synthesis and spectroscopic characterization of metal complexes with naphthofuran-2-carbohydrazide Schiff 's base

Abstract

Two Schiff-base ligands (I) naphthofuro-[phenylmethine]carbohydrazone [NPMC] and (II) naphthofruo-[3,4-dimethoxyphenylmethine]carbohydrazone [NDMeOPMC] were prepared by reaction between naphthofuran-2-carbohydrazone and benzaldehyde or 3,4-dihydroxybenzaldehyde, respectively. Both ligands are bidentate by coordinating through carboxy oxygen and azomethine nitrogen atoms. Complexes of the type MLX n were obtained. where M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II), Hg(II), UO2(II) and Th(IV), L = [NPMC] or [NDMeOPMC] and X = Cl2 for Co(II), Cu(II), Ni(II), Zn(II), Cd(II) and Hg(II) complexes, X = NO3, n = 2 for UO2(II) complexes and X = NO3, n = 4 for Th(IV) complexes. All the complexes and ligands were characterized IR, electronic, 1H NMR, ESR, conductance data and magnetic susceptibility measurements.