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Single Crystal Analysis (single + crystal_analysis)

Distribution by Scientific Domains
Chemistry100%

Kinds of Single Crystal Analysis

  • x-ray single crystal analysis
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    Selected Abstracts

    Secondary Metabolites Isolated from an Endophytic Phoma sp.

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 19 2007
    Absolute Configuration of Tetrahydropyrenophorol Using the Solid-State TDDFT CD Methodology
    Abstract The known macrolide pyrenophorol (synonym helmidiol) (1), the new 2,3,10,11-tetrahydropyrenophorol (3), and (4S,7R)-4,7-dihydroxyoctanoic acid (4), the monomeric acid of the sixteen-membered cyclic diolide 1, were isolated from an endophytic Phoma sp. The relative configuration of tetrahydropyrenophorol (3) was confirmed by X-ray single crystal analysis and its absolute configuration determined by the solid-state TDDFT CD methodology. Compounds 1 and 4 show antifungal activity and the acid 4 is also an algicide. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source]

    Titanium(IV)/Tridentate BINOL Derivative as Catalyst for meso -Aziridine Ring-Opening Reactions: High Enantioselectivity, Strong Positive Non-Linear Effect and Structural Characterization

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 1-2 2009
    Rongmin Yu
    Abstract A titanium-based chiral Lewis acid was found to be effective for the ring-opening reactions of meso -aziridines with aniline nucleophiles. The products were generally isolated in high yields and with high to excellent enantioselectivity. The catalytic system was studied by X-ray single crystal analysis. In experiments on non-linear effects a strong non-linear effect of the catalyst system was observed. [source]

    Two novel diorganotin phosphonic diamides: syntheses, crystal structures, spectral properties and in vitro antibacterial studies

    APPLIED ORGANOMETALLIC CHEMISTRY, Issue 10 2010
    Khodayar Gholivand
    Abstract Two diorganotin complexes with general formulae SnCl2(CH3)2[C6H5P(O)(NHCH(CH3)2)2]2 (1) and SnCl2(CH3)2[C6H5P(O) (NHC(CH3)3)2] (2) were prepared by the addition of one equivalent SnCl2Me2 to two equivalents of PhP(O)(NHiPr)2 and PhP(O)(NHtBu)2, respectively. The compounds were characterized by elemental analysis, IR and multinuclear NMR (1H, 13C, 31P and 119Sn) spectroscopy. The crystal structures of the complexes were determined by X-ray single crystal analysis, which revealed that complex 1 has a distorted octahedral geometry and complex 2 has a distorted trigonal bipyramidal structure with non-equivalent chlorine atoms. Preliminary antibacterial tests of the compounds against Gram-positive and -negative bacteria were carried out using the filter paper disk method and chloroamphenicol was used as standard for comparison. Copyright © 2010 John Wiley & Sons, Ltd. [source]

    Synthesis of 2-(N -arylimino)pyrrolide nickel complexes and polymerization of methyl methacrylate

    APPLIED ORGANOMETALLIC CHEMISTRY, Issue 2 2010
    Jianfeng Li
    Abstract The synthesis, characterization and methyl methacrylate polymerization behaviors of 2-(N -arylimino)pyrrolide nickel complexes are described. The nickel complex [NN]2Ni (1, [NN] = [2-C(H)NAr-5- tBu-C4H2N],, Ar = 2,6- iPr2C6H3) was prepared in good yield by the reaction of [NN]Li with trans -[Ni(Cl)(Ph)(PPh3)2] in THF. Reaction of [NN]Li with NiBr2(DME) yielded the nickel bromide [NN]Ni(Br)[NNH] (2). Complexes 1 and 2 were characterized by 1H NMR and IR spectroscopy and elemental analysis, and by X-ray single crystal analysis. Both complexes, upon activation with methylaluminoxane, are highly active for the polymerization of methyl methacrylate to give high molecular weight polymethylmethacrylate with narrow molecular distributions. Copyright © 2009 John Wiley & Sons, Ltd. [source]