Abstract

The solid complexes of La(III), Pr (III), Tb(III) ,Sm(III) and Nd(III) were prepared from bidentate Schiff base, 2-[(4-bromo-2,6-dichloro-phenylimino)-methyl]-4,6-diiodo-phenol. The Schiff base ligand was synthesized from 3,5 diiodosalicylaldehyde and 4-bromo-2,6-dichlorobenzenamine . These metal complexes were characterized by molar conductivity, magnetic susceptibility, thermal analysis, X-ray diffraction, FTIR, ¹H-NMR and UV-Vis. The analytical data of these metal complexes showed metal:ligand ratio of 1:2 La(III), Pr (III), Tb(III) ,Sm(III) and 1:1 for Nd(III) complexes. The physico-chemical study supports the presence of octahedral geometry around La(III), Pr (III), Tb(III) ,Sm(III) and Nd(III) ions. The IR spectral data reveal that the ligand behaves as bidentate with ON donor atom sequence towards central metal ion. The molar conductance values of metal complexes suggest their electrolyte nature except Nd(III) complex.