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    Structural, spectral, optical and antimicrobial properties of synthesized 1-benzoyl-3-furan-2-ylmethyl-thiourea
    (Elsevier, 2013) Karipcin, Fatma; Atis, Murat; Sariboga, Bahtiyar; Celik, Hasan; Tas, Murat
    The 1-benzoyl-3-furan-2-ylmethyl-thiourea (bftu) was synthesized and its structure was determined by elemental analyses, IR spectroscopy, H-1 and C-13 NMR spectroscopy and single crystal X-ray diffraction analysis. Also its antimicrobial activity was determined. We analyzed the optimized geometric structure and energies of bftu in the ground state as theoretically. Theoretical calculations were performed at the DFT level. Selected experimental bands were assigned and characterized on the basis of the scaled theoretical wavenumbers by their total energy distribution (TED). The nuclear magnetic resonance (NMR) chemical shifts of bftu molecule were calculated using the gauge-invariant-atomic orbital (GIAO) method in acetone solution and compared with the experimental data. The dipole moment, linear polarizability and first hyper polarizability values were also computed. (c) 2013 Elsevier B.V. All rights reserved.
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    Synthesis and Characterization of Novel Organocobaloximes as Potential Catecholase and Antimicrobial Activity Agents
    (Wiley-V C H Verlag Gmbh, 2013) Erdem-Tuncmen, Mukadder; Karipcin, Fatma; Sariboga, Bahtiyar
    An asymmetric, potentially bidentate dioxime ligand (H2L) was formed by condensation of 4-biphenylchloroglyoxime and napthyl-1-amine. Two equivalents of H2L were reacted with CoCl(2)6H(2)O under appropriate conditions with deprotonation of the dioxime ligand. A series of new organocobaloxime derivatives of the type [CoR(HL)(2)Py], [CoRL2PyB2F4], and [CoRL2Py(Cu(phen))(2)] (H2L=4-(napthyl-1-amino)biphenylglyoxime; phen=1,10-phenathroline; R=izopropyl and benzyl; Py=pyridine) were synthesized. The products were characterized by elemental analysis, molar conductance, FT-IR, H-1 NMR, and magnetic susceptibility measurements. Catecholase-like activity properties of all complexes were also studied. All complexes are catalysts for the oxidation of 3,5-di-tert-butylcatechol to 3,5-di-tert-butyl-1,2-benzoquinone in methanol. Antimicrobial activity studies of H2L and the six complexes were carried out on standard strains (human pathogenic) of bacteria (Staphylococcus aureus, methicillin-resistant S. aureus (MRSA), Bacillus cereus, Enterococcus faecalis, Streptococcus pneumoniae, Listeria monocytogenes, Bacillus subtilis, Escherichia coli, Pseudominas aeruginosa, Salmonella typhi) and the yeast Candida albicans. The compounds showed a significant inhibition of the growth of the Gram-positive bacteria tested. Among the tested microorganisms, S. aureus was the most sensitive strain, especially to H2L and its complexes.