Synthesis, Characterization, and In Vitro Antimicrobial and Antitumor Activities of Some Tetraphenylstibonium(V) Carboxylates

Several hitherto unreported pentacoordinated tetraphenylstibonium(V) carboxylates of general formula (C6H5)(4)SbL, where L = o-OHC6H5 COO-, (C6H5)(2)C(OH)COO-, 2-(6-OCH3C10H6)CH (CH3)COO-, ArCH(OH)COO- (Ar=C6H5, p-CF3- [GRAPHICS] C6H4, and p-OCH3C6H4), have been prepared and characterized by elemental analysis, solid state IR, H-1 NMR, and C-13 NMR spectra, conductivity, and molecular weight measurements. Spectroscopic data together with solution phase studies conform to the requirement of triagonalbipyramidal configuration for these compounds. They were tested for in vitro antifungal (against Aspergillus flavus and Aspergillus niger) and antibacterial (against Staphylococcus aureus and Klebsiella pneumoniae) activities. The in vitro antitumor activity of all stibonium carboxylates was examined against MCF-7 cell line. A few of them were found to exhibit moderate to significant biological activity. (C) 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:688-693, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20498