Abstract
Metal complexes of Ni(II), Co(II), Cu(II), Mn(II) and Zn(II) VO(IV) with a Schiff base derived from 3-Ethoxy Salicylaldehyde and 2-(2-amino-phenyl)1-H-Benzimidazol(2-[(Z)-{(2-(1H-benzimidazole-2yl)phenyl] imino} methyl]-6-ethoxy phenol-BMEP) were synthesized successfully. The resulting complexes were characterized by elemental analysis, magnetic moment measurements, conductivity measurements, IR, UV-VIS, 1H NMR, mass spectra and ESR spectral studies. According to these data, we propose an octahedral geometry to all the metal complexes. Antimicrobial activity of the ligand and its metal complexes were studied against two gram negative bacteria:E. coli, Pseudomonas flourescenceand two gram positive bacteria:Bacillus subitilis, Staphylococcus aureus. The activity data show that the metal complexes are more potent than the free ligand.
Highlights
In the field of coordination chemistry, Schiff base metal complexes have a curious history[1,2]
Metal complexes with Schiff base ligands have been studied for their application in biological, clinical, analytical and pharmacological areas[3]
Synthesis of Schiff base A mixture of 2-(2-aminophenyl)1-H-benzimidazole (2.09 g; 0.01 mol) and 3-ethoxy salicylaldehyde (1.66 g; 0.01 mol) and a drop of acetic acid was dissolved in 25 mL of ethanol and heated on a steam bath for 45-60 min
Summary
In the field of coordination chemistry, Schiff base metal complexes have a curious history[1,2]. Metal complexes with Schiff base ligands have been studied for their application in biological, clinical, analytical and pharmacological areas[3]. Characterization and Antimicrobial activity of Transition 2517 of the ligand which coordinates through the tertiary nitrogen of the imidazole ring, the exocyclic imine nitrogen of 2-(2-aminophenyl)1-H- benzimidazole. Infrared spectra of ligands and their complexes were recorded on Perkin Elmer Infrared model 337 spectrometer in KBr pellets in the range of (4000-400 cm-1). Synthesis of Schiff base A mixture of 2-(2-aminophenyl)1-H-benzimidazole (2.09 g; 0.01 mol) and 3-ethoxy salicylaldehyde (1.66 g; 0.01 mol) and a drop of acetic acid was dissolved in 25 mL of ethanol and heated on a steam bath for 45-60 min. The precipitated complex was filtered off, washed with anh.ethanol and dried in vacuum at room temperature
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