PREPARATION, SPECTROSCOPIC CHARACTERIZATION OF A NEW Cd(II) COMPLEX CONTAINING TRIDENTATE NNO SCHIFF BASE DERIVED AND X-RAY CRYSTALLOGRAPHIC STRUCTURAL STUDY OF 3,4,5-TRIHYDROXYBENZOIC ACID[1-(PYRIDYL)-ETHYLIDENE]HYDRAZONE

a new cd(ii) complex with a tridentate schiff base derivative which was obtained from condensation of gallic hydrazid with 2-acetylpyridine has been prepared. the structure of the ligand 3,4,5-trihydroxybenzoic acid[1-(pyridyl)-ethylidene]hydrazone (gapy) was confirmed using the x-ray structure analysis. the elemental analysis, ftir, uv-vis, 1h nmr spectral and thermal analysis indicates that the schiff base ligand gapy is a tridentate ligand which is coordinated with the cd(ii) complex through n,n and o atoms. thus, the acetate ion is a bidentate ligand that is coordinated with the metal ion through two o atoms.