SYNTHESIS AND CHARACTERIZATION OF SOME METAL COMPLEXES WITH IETS AS LIGAND DERIVED FROM 2-ACETLYLINDAN-1,3-DIONE

Abstract

The present investigation are based on the synthesis and characterization of metal complexes with Schiff’s bases (anils) α– (1, 3– dioxo– indan– 2–yl) – ethylidene– thiosemicarbazone(IETS) derived from 2-substituted acetyl 1, 3 - dione by condensing it with primary aryl amine (aniline) in absolute alcohol. 2-acetyl indan-1, 3-dione was prepared by claisen-condensation. The Co (II), Ni(II), Cu (II), Zn (II), Cd (II), Fe (III), V (III) and Cr (III) complexes of the Schiff’s bases have been prepared in the reactions and investigated their structures by physicochemical methods. The formulation and structure of the ligands have been screened by their chemical analysis, IR, PMR and mass-spectral studies. The PMR spectrum of the metal complexes in quite similar to the PMR spectrum of the anil (IETS) with slight change in the position of PMR signals. The metal complexes are thermally stable at higher temperature (̴ 300o). These characteristics suggest polymeric nature of the metal complexes. The observed molar conductance values of the complexes with IETS have been found in the range 170 to 250 mhos cm2g mol-1. The mass-spectra of this IETS showed the molecular ion peak as a base peak at m/z 261. The structure of ligand has been confirmed by their mass–spectral studies. Keywords: Metal Complexes, Schiff’s bases, 2-Acetlylindan-1,3-Dione