New 14-membered octaazamacrocyclic complexes: Synthesis, spectral, antibacterial and antifungal studies

Department of Chemistry, National Institute of Technology, Kurukshetra 136 119, India.
European Journal of Medicinal Chemistry (Impact Factor: 3.45). 03/2010; 45(3):1230-6. DOI: 10.1016/j.ejmech.2009.12.009
Source: PubMed


A novel series of macrocyclic complexes of the type [M(C(18)H(14)N(10)S(2))X]X(2) where M=Cr(III), Fe(III) and Mn(III); X=Cl(-), NO(3)(-) and CH(3)COO(-) have been synthesized by [2+2] condensation of thiocarbohydrazide and isatin in the presence of trivalent metal salts in methanolic medium by template method. The complexes have been characterized with the help of elemental analyses, conductance measurements, magnetic measurements, electronic, NMR, IR and mass spectral studies. On the basis of these studies, a five coordinate square pyramidal geometry for all of these complexes has been proposed. These metal complexes were also tested for their in vitro antimicrobial activities against some bacterial strains viz. Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa and some fungal strains Aspergillus niger, Aspergillus flavus (molds), Candida albicans, Saccharomyces cerevisiae (yeasts).

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    • "The metal nitrogen bonding possesses high importance in the field of agriculture, medicine and industry due to its prominence antifungal , antibacterial and anticancer activities [9] [10] [11] [12]. The macrocyclic polyamine ligands bearing functional pendant donor groups act as effective models for protein–metal-binding sites in metalloproteins in some biological systems, as potential therapeutic reagents or as multi-electron catalysts [13]. "
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