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2001 (1)
1990 (1)
1Author    V. Vill, J. ThiemRequires cookie*
 Title    Flüssigkristalle mit monosubstituierten alicyclischen und heteroalicyclischen Ringen Liquid Crystals Derived from Mono-Substituted Alicyclic and Heteroalicyclic Rings  
 Abstract    Twenty two liquid crystalline mono-substituted cyclopentanes and cyclohexanes including their oxygen analogues were prepard and studied. Smectic phases with clearing temperatures 5^80 °C were observed, and these do not differ considerably between the esters of the more flexible five-mem-bered ring derivatives and those of the conformationally more rigid six-membered rings. In case of the latter, decreasing clearing points ar observed with increasing ratios of the axial conformation (static conformational effect). Altogether rather low clearing points are observed, which may be interpreted by a dynamic conformational effect owing to which fast ring inversion causes the compounds to appear in a bulkier shape, and this results in a disadvantageous packing in the mesophase. 
  Reference    Z. Naturforsch. 45a, 1345—1348 (1990); eingegangen am 21. Oktober 1990 
  Published    1990 
  Keywords    Alicyclic rings, Liquid crystals, Conformation, Oxygen heterocycles 
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 TEI-XML for    default:Reihe_A/45/ZNA-1990-45a-1345.pdf 
 Identifier    ZNA-1990-45a-1345 
 Volume    45 
2Author    P. P. Nath, S. Sarkar, P.S R Krishna3, R. N. JoarderRequires cookie*
 Title    Molecular Conformation and Structural Correlations of Liquid D-terf-Butanol at Room Temperature by Neutron Diffraction  
 Abstract    An analysis o f neutron diffraction data o f liquid deuterated terr-butanol at room temperature to determine its molecular conformation is presented. Being a big molecule o f 15 sites, the analysis is tricky and needs careful consideration. The resulting molecular parameters are compared with those obtained from other experimental data analysis and model calculations. The information about the intermolecular structural correlations, hydrogen-bonded molecular association in partcular is also obtained from the diffraction data analysis. -PACS number: 61.25 
  Reference    Z. Naturforsch. 56a, 825—831 (2001); received August 13 2001 
  Published    2001 
  Keywords    Conformation, Structure, Correlation, D-terr-Butanol, Neutron Diffraction 
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 TEI-XML for    default:Reihe_A/56/ZNA-2001-56a-0825.pdf 
 Identifier    ZNA-2001-56a-0825 
 Volume    56