Abstract
Schiff base ligand (L) derived from glyoxal and 4-aminoantipyrine was synthesized. The ligand (L) has been characterized by IR, NMR, electronic spectral studies and electrochemical studies. Cu(II) complexes of a Schiff base ligand (L) from 4-aminoantpyrine and glyoxal having the composition [CuL1]X2 where X = Cl¯ or NO3¯ have been prepared and characterized by elemental analysis, electrical conductivity in non-aqueous solvent, infrared and electronic, as well as cyclic voltammetric studies. L acts as a neutral tetradentate ligand coordinating through both the carbonyl oxygen and azomethine nitrogen. On both the complexes both the anions are not coordinated. A square planar geometry is assigned for complexes. The electrochemical studies of ligand show a typical cyclic voltammogram for an irreversible process. While copper(II) complexes show the typical cyclic voltammograms for quasi reversible process.
Highlights
L acts as a neutral tetradentate ligand coordinating through both the carbonyl oxygen and azomethine nitrogen
The high affinity for the chelation of the Schiff bases towards the transition metal ions is utilized in preparing their solid complexes
Schiff bases are condensation products of primary amines and carbonyl compounds and they were discovered by a German chemist, Nobel Prize winner, Hugo Schiff in 1864 [5]
Summary
A large number of Schiff bases and their complexes have been studied for their interesting and important properties, e.g; their ability to reversibly bind oxygen [1], catalytic activity in hydrogenation of olefins and transfer of an amino group [2], photochromic properties [3], and complexing ability towards some toxic
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