SYNTHESIS AND CHARACTERISATION OF LANTHANIDE (III) CHLORIDE COMPLEXES WITH BIDENTATE DONOR 2-AMINO-4-METHYL BENZOTHIAZOLE

Kavita L. Kendre*

ABSTRACT

The Nd(III), Sm(III) and Tb(III) complexes of 2-amino-4-methyl benzothiazole have been synthesized in alcohol and refluxed in the reaction medium (1:3, M: L ratio).The yield percentage of formed complex is ranging from 60-70%. The complexes are colored solids. The complexes were synthesized and characterized by elemental analysis, IR, electronic spectra, molar conductance, TGA and powder XRD. An IR spectrum indicates that the ligand behaves as bidentate ligand. Molar conductance studies indicates the electrolytic behaviour of these complexes. Thermal decomposition profiles are consistent with the proposed formulations. The powder XRD studies show that all the complexes are amorphous in nature. The antimicrobial activities of the ligand and their metal complexes were screened by agar diffusion method and found that the metal complexes have higher antimicrobial activity than the free ligand.

Keywords: 2-amino 4-methyl benzothiazole, inner transition metals, antimicrobial activity.