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    Spectroscopic Studies and Crystal Structure of 4-(2-Hydroxy-3-Methoxybenzylideneamino)-N-(5-Methylisoxazol-3-yl) Benzenesulfonamide
    (Springer/Plenum Publishers, 2010) Yıldız, Mustafa; Unver, Hueseyin; Erdener, Digdem; Iskeleli, Nazan Ocak
    Schiff base 4-[(2-hydroxy-3-methoxybenzylideneamino)-N-(5-methylisoxazol-3-yl)benzene-sulfonamidehas been synthesized from the reaction of 4-amino-N-(5-methylisoxazol-3-yl)benzenesulfonamide(sulfamethoxazole) with 2-hydroxy-3-methoxybenzaldehyde. It has been characterized by elemental analysis, MS, IR, H-1 NMR, C-13 NMR, HET-COR and UV-Visible techniques. The structure of it also has been examined crystallographically. For the compound exist as dominant form of enol-imines in both the solid state and the solutions. It crystallizes in the monoclinic space group P2(1)/c with a = 8.2694(7), b = 8.3453( 5), c = 26.260( 2) angstrom, beta = 97.142(7)degrees, V = 1798.1(2) angstrom(3) , D-x = 1.431 g cm(-3), R-1 = 0.0529 and wR(2) = 0.1370 [ I > 2 sigma(I)], respectively.
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    Öğe
    Spectroscopic study and structure of (E)-2-[(2-chlorobenzylimino)methyl]methoxyphenol
    (Pergamon-Elsevier Science Ltd, 2009) Unver, Hueseyin; Yıldız, Mustafa; Ozay, Hava; Durlu, Tahsin Nuri
    (E)-2-[(2-Chlorobenzylimino)methyl]methoxyphenol has been synthesized from the reaction of 2-hydroxy-3-methoxy-1-benzaldehyde(o-vanillin) with 2-chlorobenzylamine. The title compound has been characterized by using elemental analysis, FT-IR, H-1 NMR, C-13 NMR and UV-vis spectroscopic techniques. The crystal structure of the title compound has also been examined cyrstallographically. It crystallizes in the orthorhombic space group Pbca with unit cell parameters: a = 7.208(1)angstrom, b = 13.726(2)angstrom, c= 27.858(4) angstrom, V= 2756.0(1) angstrom(3), D, = 1.18 g cm(-3) and Z= 8. The crystal structure was solved by direct methods and refined by full-matrix least squares to a find R=0.046 for 2773 observed reflections. (C) 2009 Elsevier B.V. All rights reserved.
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    Öğe
    Tautomerism in Solution and Solid State, Spectroscopic Studies and Crystal Structure of (Z)-1-[(4-amino-2,3,5,6-tetramethylphenylamino)methylene]-1,8a-dihydronaphthalen-2(3H)-one
    (Taylor & Francis Inc, 2010) Unver, Hueseyin; Yıldız, Mustafa
    A new Schiff base compound(Z)-1-[(4-amino-2,3,5,6-tetramethylphenylamino)methylene]-1,8a-dihydronaphthalen-2(3H)-onewas synthesized by the reaction of 2-hydroxy-1-naphthaldehyde with 2,3,5,6-tetramethyl-p-phenylenediamine. It was investigated by using elemental analysis, IR, 1H-NMR, 13C-NMR, UV-Visible-spectroscopy, and X-ray-crystallography techniques. Its UV-Visible spectra were examined in polar and nonpolar solvents. The Schiff base studied exists in enol-imine keto-amine form in DMSO ethanol, chloroform, and benzene solution. The keto-amine tautomer was found to be dominant in both the phases. The (Z)-1-[(4-amino-2,3,5,6-tetramethylphenylamino)methylene]-1,8a-dihydronaphthalen-2(3H)-one molecule is not planar. It contains a strong intramolecular N-H...O hydrogen bond between the amine and oxo group [N1 and O1=2.591(2) angstrom], the H atom being essentially bonded to the N1 and O1 atoms.