| Abstrakt: |
Complexes of Ti(III), Cr(III), Mn(III), Fe(III), VO(IV), MoO2(VI), WO2(VI), and UO2(VI) with 3‐(1‐(2‐(1‐(2,4‐dihydroxyphenyl)ethylideneamino)‐cyclohexylimino)‐ethyl)‐4‐hydroxy‐6‐methyl‐2H‐pyran‐2‐one (H2L) are reported and have been characterized by various spectroscopic techniques like IR, UV–visible, 1H & 13C NMR, Mass, XRD, and ESR as well as elemental analyses, magnetic, and thermal measurements and also by the aid of molar conductivity measurements. It is found that the ligand behaves as a dianionic tetradentate coordinating to the metal ion with 1:1 metal to ligand stoichiometry. An octahedral geometry is proposed for all the complexes except Mn(III) and VO(IV) complexes, which possess square pyramidal geometry. The thermal studies show the type of water molecules involved in metal complexes as well as the thermal decomposition of the metal complexes. The compounds are subjected to antimicrobial activity screening and minimum inhibitory concentration is determined. Microbial assay of the above compounds against Escherichia coli MTCC 443, Pseudomonas aeruginosa MTCC 424, and Staphylococcus aureus MTCC 96 and fungal strains Candida albicans MTCC 227 and Aspergillus niger MTCC 282 shows that complexes exhibit higher activity than the ligand. [ABSTRACT FROM AUTHOR] |
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