Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7211515 | Beni-Suef University Journal of Basic and Applied Sciences | 2017 | 9 Pages |
Abstract
A new coordination unimetallic and heterobimetallic complexes of hexadentate N2O4 donor dihydrazone ligands were prepared by the condensation of 4-formyl antipyrine with adipic dihydrazide and succinic dihydrazide. The ligands (1) and (11) and their complexes thoroughly characterized using various analytical, physical and spectroscopic techniques, which indicate a distorted octahedral geometry around the metal ions. The ESR spectra of solid copper(II) complexes (2-4) and (12-14) showed axial symmetry with g||>gâ¥Â > ge, indicating distorted octahedral structure and the presence of the unpaired electron in a d(x2ây2) orbital with significant covalent bond character. The antimicrobial activity results of the metal compounds (2-5), (7), (10), (12-15) and (17) show that, all these complexes exhibit inhibitory moderate to mild effects towards Bacillus subtilis, Escherichia coli and Aspergillus niger.
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Authors
Fathy A. El Saied, Mokhles M. Abd-Elzaher, Abdou S. El Tabl, Mohamad M.E. Shakdofa, Anas J. Rasras,