Journal
JOURNAL OF COORDINATION CHEMISTRY
Volume 67, Issue 18, Pages 3107-3120Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2014.951346
Keywords
Mononuclear Zn(II), Cd(II), and Ag(I) complexes; NNNO-donor ligands; Crystal structure; Antifungal activity; Antimicrobial activity
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Funding
- Department of Science and Technology, Government of India, New Delhi
- Department of Biotechnology, Government of India, New Delhi
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An N3O Schiff base (L), 1 : 1 condensate of benzil monohydrazone and 4-pyridine carboxaldehyde, and its Zn(II), Cd(II), and Ag(I) complexes were synthesized and characterized by elemental analyses and various spectroscopic techniques. The crystal structures of [ZnL2Br2] (1), [CdL2I2]center dot CH2Cl2, (2)center dot CH2Cl2, and [Ag(L)(2)]ClO4 (3) have been determined using X-ray crystallography. The Zn(II) and Cd(II) complexes show a tetrahedral configuration whereas in the asymmetric unit of 3, two independent coordination units of Ag(I) are present. Carbonyl-silver interaction, weak C-HMIDLINE HORIZONTAL ELLIPSISO interaction, and also pi-pi interaction are present in 3 in the solid state. The synthesized complexes have antibacterial activity against Klebsiella pneumoniae 114, Escherichia coli K88, Salmonella typhi ATCC 34, Bacillus subtilis UC564, and Staphylococcus aureus ATCC25923. The results showed that in some cases the antibacterial activities of the complexes were comparable to standard antibiotics Tetracycline and Streptomycin. The antifungal activities of the complexes were also studied for Aspergillus niger, Aspergillus oryzae, Penicillium notatum, and Saccharomyces cerevisiae. MIC values of 1, 2 center dot CH2Cl2, and 3 are less than the Nystatin standard.
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