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    Öğe
    Spectroscopic studies and crystal structure of (E)-N?-(2-hydroxy-3-methoxybenzylidene)isonicotinohydrazide
    (Pleiades Publishing Inc, 2013) Ozay, H.; Yildiz, M.; Unver, H.; Kiraz, A.
    The structure of compound has also been examined cyrstallographically. It crystallizes in the monoclinic space group P2(1)/c with a = 7.673(1), b = 16.251(2), c = 10.874(1) , beta = 110.42(1)A degrees, V = 1270.7(3) (3), D (x) = 1.418 g cm(-3), R (1) = 0.0349 and wR (2) = 0.0935 [I > 2 sigma(I)], respectively. The title compound has been synthesized from the reaction of isonicotinohydrazide with 2-hydroxy-3-methoxybenzaldehyde. It has been characterized by using elemental analysis, MS, IR, H-1 NMR, C-13 NMR and UV-Visible spectroscopic techniques.
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    Öğe
    Spectroscopic studies and structure of 3-methoxy-2-[(2,4,4,6,6-pentachloro-1,3,5,2?5,4?5,6?5-triazatriphosphin-2-yl)oxy]benzaldehyde
    (Pleiades Publishing Inc, 2013) Ozay, H.; Yildiz, M.; Unver, H.; Durlu, T. N.
    The compound called 3-methoxy-2-[(2,4,4,6,6-pentachloro-1,3,5,2 lambda(5),4 lambda(5),6 lambda(5)-triazatriphosphin-2-yl)oxy]benzaldehyde has been synthesized from the reaction of 2-hydroxy-3-methoxybenzaldehyde with hexachlorocyclotriphosphazene. It has been characterized by elemental analysis, MS, IR, H-1 NMR, C-13 NMR, P-31 NMR and UV-visible spectroscopic techniques. The structure of the title compound has been determind by X-ray analysis. Crystals are orthorhombic, space group P2(1)2(1)2(1), Z = 4, a = 7.705(1), b = 12.624(1), c = 17.825(2) , R (1) = 0.0390 and wR (2) = 0.1074 [I > 2 sigma(I)], respectively.
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    Öğe
    Synthesis and spectral, antimicrobial, anion sensing, and DNA binding properties of Schiff base podands and their metal complexes
    (Maik Nauka/Interperiodica/Springer, 2015) Yildiz, M.; Tan, E.; Demir, N.; Yildirim, N.; Unver, H.; Kiraz, A.; Mestav, B.
    Schiff base podands have been synthesized by reaction of triethylene glycol bis(4-aminophenyl) ether with salicylaldehyde, 5-substituted salicylaldehydes, and 2-hydroxy-1-naphthaldehyde. Manganese(II), iron(II), cobalt(II), nickel(II), and copper(II) complexes have been prepared from the salicylaldehyde-based podand via reaction with MCl2 center dot nH(2)O. The structures of the ligands and complexes have been studied by elemental analysis, FT-IR and UV-visible spectroscopy, H-1 and C-13 NMR, and thermogravimetric analysis. The UV-visible spectral and TG data suggest tetrahedral geometry of the metal complexes. The antimicrobial activities of the ligands and metal complexes have been evaluated as minimum inhibitory concentrations with respect to bacteria and yeast cultures. The interaction of the Schiff base podands with calf thymus DNA has been investigated by UV-visible spectroscopy, and intercalative binding to DNA has been found. The anion recognition ability of all Schiff base podands has been examined by UV-visible spectroscopy. A visually detectable color change has been observed upon addition of fluoride, cyanide, hydroxide, and acetate ions due to formation of 1: 1 H-complexes and/or deprotonation of the receptor. No significant color change has been observed upon addition of other anions such as dihydrogen phosphate, bromide, iodide, thiocyanate, perchlorate, and hydrogen sulfate.
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    Öğe
    Synthesis, antimicrobial activity, genotoxicity, DNA binding and DNA cleavage studies of new glycine methyl ester derivative Schiff base
    (Wiley-Blackwell, 2016) Yildirim, M. A.; Demir, N.; Yildiz, M.; Unver, H.
    [Anstract Not Available]
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    Öğe
    Tautomeric properties and crystal structure of N-[2-hydroxy-1-naphthylidene]2,5-dichloroaniline
    (Wiley-V C H Verlag Gmbh, 2006) Yildiz, M.; Unver, H.; Erdener, D.; Ocak, N.; Erdonmez, A.; Durlu, T. Nuri
    The title compound has been synthesised by the reaction of 2-hydroxy-1-naphthaldehyde with 2,5-dichloroaniline. The compound was characterized by elemental analysis, IR and UV-Visible techniques. The UV-Visible spectra of the Schiff base with OH group in ortho position to the imino group was studied in polar and nonpolar solvents in acidic and basic media. The structure of compound has been examined cyrstallographically. It crystallizes in the or-thorhombic space group P2(1)2(1)2(1) with a = 6.059(1), b = 12.105(2) c = 20.006(2) angstrom, V = 1467.4(3) angstrom(3), D-x = 1.431 g.cm(-3) and Z = 4. The crystal structure was solved by direct methods and refined by full-matrix least squares. Molecule of the title compound N-[2-hydroxy-1-naphthylidene]2,5-dichloroaniline is nearly planar. The molecule contains a strong intramolecular N...H-O hydrogen bond between the imine and hydroxyl group [O1 and N1 = 2.540(4) angstrom]. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.