Preparation and characterization of Ni(II), Co(II), Cu(II), Cd(II), Zn(II) and Hg(II) complexes with schiff base derived from benzofuran-2- carbohydrazide and p-chloroacetophenone

Abstract

The complexes of Ni(II), Co(II), Cu(II), Cd(II), Zn(II) and Hg(II) ions with Schiff base derived from reaction between benzofuran-2-carbohydrazide and p-chloroacetophenone have been synthesized. All the complexes have been characterized on the basis of elemental analysis, magnetic moments and spectral studies. All the complexes are light in colour and stable to atmosphere. The elemental analysis shows that MLCl2 stoichiometry for all the complexes. The IR spectral data indicates the coordination through carbonyl oxygen and azomethine nitrogen groups. The molar conductance values of all the complexes fall in the range 11.5-18.05 ohm -1cm 2mol -1, indicating non-electrolytic behaviour of all the complexes. The electronic spectral data suggest that polymeric octahedral structures for Cu(II), Ni(II) and Co(II) complexes. The magnetic moment values for these complexes are 4.95, 2.85 and 1.92 respectively suggesting octahedral geometry. The Cd(II), Zn(II) and Hg(II) complexes are monomeric tetrahedral in nature.