Synthesis and Spectroscopic Studies of Some Furfuraldehyde Schiff Bases Complexes


Abstract Different types of complexes with different stoichiometries were isolated for Co(II), Ni(II) and Cu(II). These complexes having the general formulae [M(L)2Cl2] and [Cu(L)2]Cl2 (where M is Co(II) and Ni(II) and L is Schiff base formed by condensation of furfuraldehyde and butylamine (FBA), or hexylamine (FHA) ). These complexes have been prepared and characterized by elemental analysis, molar conductivity measurements, study of the infrared and UV-visible spectra and by magnetic susceptibility measurement. Elemental analysis suggests the stoichiometry to be 1 : 2 (metal : ligand). For cobalt and nickel, coordination of the inorganic anions was noticed to give hexacoordinated complexes with octahedral structure, while copper complexes are tetracoordinated with square planar geometry. Infrared spectra of all the complexes agree with the coordination to the central metal atom through nitrogen of azomethine group and furan ring oxygen atoms and Schiff bases behave as bidentate ligands with O and N donor atoms. Conductance measurements suggest the non-electrolytic nature of the cobalt and nickel complexes and the 1:2 electrolytic nature of the copper complexes.