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E-Journal of Chemistry
Volume 8, Issue 1, Pages 361-367

New Ternary Transition Metal Complexes of 2-{[(2-aminophenyl)imino] methyl}Phenol and Metformin: Synthesis, Characterization and Antimicrobial Activity

S. S. Sharma,1 J. V. Ramani,1 D. P. Dalwadi,1 J. J. Bhalodia,1 N. K. Patel,1 D. D. Patel,1 and R. K. Patel2

1Department of Chemistry, Hemchandracharya North Gujarat University, Patan, Gujarat-384 265, India
2Department of Life Science, Hemchandracharya North Gujarat University, Patan, Gujarat-384 265, India

Received 21 June 2010; Accepted 15 August 2010

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Complexes of Co(II), Ni(II) and Cu(II) were synthesized from Schiff base 2-{[(2-aminophenyl)imino]methyl}phenol and metformin. The authenticity of the transition metal complexes were characterized by elemental analyses, conductance and magnetic susceptibility measurements, as well as spectroscopic (IR, electronic) and thermal studies. IR spectral studies revealed the existence of the ligands in the amine form in the solid state. The magnetic and electronic spectral studies suggest an octahedral geometry for all the complexes. The metformin acts as a bidentate ligand and Schiff base of o-phynelendiamine and salicylaldehyde acts as a tridentate ligand. Antimicrobial screening of the Schiff base, metformin and transition metal complexes were determined against the bacteria Escherichia coli and Bacillus megaterium.