title: Metalloantibiotics: synthesis and antibacterial activity of cobalt(II), copper(II), nickel(II) and zinc(II) complexes of kefzol.
abstract: Kefzol (kzl), a beta-lactam antibiotic, possesses various donor sites for interaction with transition metal(II) ions [Co(II), Cu(II), Ni(II) and Zn(II)] to form complexes of the type [M(kzl)2]Cl2 and [M(kzl)Cl], with molar ratio of metal: ligand (M:L) of 1:2 and 1:1 respectively. These complexes were prepared and characterized by physicochemical and spectroscopic methods. Their IR and NMR spectra suggest that kefzol potentially acts as a bidentate, tridentate as well as monoanionic tetradentate ligand. The complexes have been screened for antibacterial activity and results were compared with the activity of the uncomplexed antibiotic against Staphylococcus aureus, Klebsiella pneumoniae, Pseudomonas aeruginosa, Escherichia coli and Proteus mirabilis. The metal complexes were found to be more potent against one or more bacterial species than the uncomplexed kefzol.
authors.affiliation: Department of Chemistry, Bahauddin Zakariya University, Multan, Pakistan.
authors.forename: Zahid H
authors.initials: ZH
authors.lastname: Chohan
authors.forename: Claudiu T
authors.initials: CT
authors.lastname: Supuran
authors.forename: Andrea
authors.initials: A
authors.lastname: Scozzafava
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002437:Cefazolin / Q000138:chemical synthesis* / Q000494:pharmacology; D003035:Cobalt / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D004926:Escherichia coli / Q000187:drug effects; D007711:Klebsiella pneumoniae / Q000187:drug effects; D008670:Metals / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry; D019906:Nuclear Magnetic Resonance, Biomolecular; D011513:Proteus mirabilis / Q000187:drug effects; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D013055:Spectrophotometry, Infrared; D013211:Staphylococcus aureus / Q000187:drug effects; D015032:Zinc / Q000737:chemistry
chemical_list: D000900:Anti-Bacterial Agents; D008670:Metals; D003035:Cobalt; D003300:Copper; D009532:Nickel; D002437:Cefazolin; D015032:Zinc