Synthesis and Chelating Behaviour of Multidentate Ligand With Some Transition Metal(II) Ions

Navneet Sinha, Sahdeo Kumar, Deepak Kumar, Chandra Mauleshwar Chandra, Santosh Kumar and Shivadhar Sharma*

University Department of Chemistry. Magadh University, Bodh Gaya-824 234, India

*Corresponding author: E-mail: sharma.shivadhar@gmail.com

Abstract

A multidentate ligand, 1-benzoyl-2-(2′-carboxylphenyl)iminopropane (BIPH) has been prepared by the condensation of 1-phenylbutane-1,3-dione and anthranilic acid. This ligand has been used for chelation with Co(II), Ni(II) and Zn(II) metal ions as primary ligand while H2O, pyridine and α-picoline as the secondary ligands. The low value of molar conductivity of 10-3 M DMF solution of complexes shows that all the complexes are non-electrolyte. The comparison of IR spectra of complexes with that of free ligand reveals that the ligand chelates through deprotonated enolic -OH group oxygen and azomethine nitrogen and not through azomethine nitrogen and carboxylic oxygen or through carbonyl oxygen and carboxylic oxygen. On the basis of magnetic moment values and electronic spectra, octahedral symmetry has been assigned to these complexes with tetragonal distortion. Thermogravimetric analysis also confirms the tetragonal distortion with elongation along z-axis in complexes.

Keywords

Transition metal(II) complexes, Chelation, 1-Phenylbutane-1,3-dione, Anthranilic acid.

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