Synthesis, Characterization and Thermogravimetric Analysis of Cobalt (III) and Zirconium(IV) Complexes With N-(3-Nitrobenzylidene)-N,N’-Dimethyl-4-Aminoantipyrine

International Journal of Research and Scientific Innovation (IJRSI) | Volume VII, Issue I, January 2020 | ISSN 2321–2705

Synthesis, Characterization and Thermogravimetric Analysis of Cobalt (III) and Zirconium(IV) Complexes With N-(3-Nitrobenzylidene)-N,N’-Dimethyl-4-Aminoantipyrine

Aswathy Sudhakar.S¹, Anitha Raj.P², Keerthi L.S³

^1,2,3Department of Chemistry, Christian College, Kattakada, Kerala, India

Abstract : The Schiff base ligand (3-nitrobenzylidiene)-N,N’-dimethyl-4-amino antipyrine was prepared by the condensation between 3-nitrobenzaldehyde and N,N’-dimethyl-4-amino antipyrine. The Co and Zr complexes of the corresponding ligand were prepared and was characterized by different methods like CHN analysis, IR and UV spectra. From CHN analysis and IR spectral data the structures of Co complex and Zr complex are found to be octahedral structure. The complexes were analysed for its thermal stability.

Key Words : 3-nitrobenzaldehyde, N, N’-dimethyl-4-aminoantipyrine, Thermogravimetry, Schiff base

I. INTRODUCTION

Coordination Chemistry is a branch of inorganic chemistry which encompasses a great diversity of structures. The term coordination is used to describe the nature of metal ligand bond. Coordination compounds of transition metals was discovered in 1798 by Tassert. The increased development in the field of spectroscopic analysis like IR, UV, Raman, NMR, EPR, Mass spectroscopy etc facilitate the progress of research in the field of coordination compounds.

According to Werners theory ligand donate electron pair to metal ion or atom to form co-ordinate linkage. This approach was first applied to co-ordination compounds by Linus Pauling and Slater (1931) [1].

Crystal field theory developed by Bethe[2] and Van Vleck[3] is another approach to study the complexes .According to this theory, the bond between metal and ligand is neither due to sharing of electron nor due to interaction of atomic orbitals. Crystal field theory involves electrostatic approach to the bonding in complexes.

Schiff bases are condensation products of amines with active carbonyl compounds. They were discovered by a German chemist, Nobel prize winner ,Hugo Schiff in 1864[4]. The Schiff bases are also called imines, anils and azomethines[5] They contain azomethine (>C=N) group and hence can act as effective ligand. The chemistry of the carbon–nitrogen double bond plays a vital role in the progress of chemical science. Solvent based synthesis of Schiff bases through classical condensation of aldehyde and amines require PH control, however, the yield of product, in high and in low PH range (3-4) depending upon the basicity of amines.

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