Synthesis and Characterization of Schiff Base Derivative and Their Transition Metal Complexes

Ng, Yoke Mooi (2014) Synthesis and Characterization of Schiff Base Derivative and Their Transition Metal Complexes. [Final Year Project Report] (Unpublished)

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Abstract

Two new hydrazone schiff bases, Ll and L2 were synthesized from the condensation reactions of 2°-hydroxyacetophenone with isonicotinic acid hydrazide and 4°- methoxyacetophenone with phenyl hydrazide respectively. Their transition metal complexes, LlZn, LlCo, LlNi, L2Co and L2 were synthesized by refluxing corresponding ligands in I :1 ratio except L2Zn in 2: I ratio. The characteristics of ligands 1 and 2, and their transition metal complexes (Zn(U), Co(II), Ni(Il)) were determined using FTIR, UV-visible, GC-MS, elemental analysis, NMR spectroscopy and X-ray crystallography (L2Zn). Spectral studied showed that the Hydrazone Schiff bases, Ll and L2 undergo keto-enol tautomerization during complexation with metals and acted as tridentate ligands (N,N,O) to form LlZn, LlCo, LlNi, L2Co and L2Ni. The crystallography result showed that the L2 acted as bidentate ligand (N,O) towards Zn(II) ion and forming disorder square planar in geometry with Zn(ll).

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