Preparation and Antibacterial Activity of Mixed Ligand Complexes of Co(II), Ni(II), Cu(II) and Cd(II) Derived from 1-Phenylazo-2-naphthol and Salicylaldehyde

S A I Sharif,A A Elamari,A N El-Tajoury

doi:10.1155/2011/519273

S A I Sharif, A A Elamari + Show 1 more

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https://doi.org/10.1155/2011/519273

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Abstract

The mixed ligand complexes of Co(II), Ni(II), Cu(II) and Cd(II) have been synthesized by using 1-phenylazo-2-naphthol as primary ligand and salicylaldehyde as secondary ligand. All the prepared complexes were identified and confirmed by elemental analyses (C, H and N), molar conductance measurements, infrared, electronic absorption and electron paramagnetic resonance. The elemental analysis data suggest that the stoichiometry of the complexes to be 1:1:1[M: L1: L2] ratio. The molar conductance measurements of the complexes indicate their non-electrolytic nature. The infrared spectral data showed the coordination sites of the free ligand with the central metal ion. The electronic absorption spectral data revealed the existence of an octahedral geometry for Co(II) and Cd(II) complexes and a square planar geometry for Ni(II) and Cu(II) complexes. The electron paramagnetic resonance spectra of the Co(II) and Cu(II) complexes showed the existence a paramagnetic phenomenon and supported their geometrical structures which confirmed by the electronic absorption spectra. The ligands and mixed ligand complexes have been tested on antibacterial activity against three strains of pathogenic bacteria such asEscherichia coli, Staphylococcus aureusandPseudomonas aeruginosa

Highlights

The mixed ligand complexes of Co(II), Ni(II), Cu(II) and Cd(II) have been synthesized by using 1-phenylazo-2-naphthol as primary ligand and salicylaldehyde as secondary ligand
Ions with salicylaldehyde, phathalic acid and L-alanine have been prepared and the investigation was done by using different physical techniques, in particular; elemental analysis, molar conductivity, infrared and electron paramagnetic resonance spectra[2]
Synthesis and characterization of Co(II), Ni(II), Cu(II) and Zn(II) complexes with 3-salicylienehydrazono-2-indolinone was carried out by Konstantininovic et al.[4]. They found that Ni(II) and Cu(II) complexes have a square planar geometry and a tetrahedral one for the Co(II) and Zn(II) complexes and were found to exhibit antibacterial activity against Staphylococcus aureus, Enterococcus D, Proteus mirabilis, Escherichia coli, Bacillus anthracis, Pseudomonas aeruginosa and Candida albicans

Summary

Introduction

The mixed ligand complexes of Co(II), Ni(II), Cu(II) and Cd(II) have been synthesized by using 1-phenylazo-2-naphthol as primary ligand and salicylaldehyde as secondary ligand. 1-Phenylazo-2-naphthol and salicylaldehyde are bidentate ligands and have a good ability to form many transition metal ion complexes[1].

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