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'Heterocyclic Compounds' in keywords
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1997 (1)
1992 (1)
1Author    Ralf Schmidt, Christian Gebauer, Olaf Klein, Wolfhart SeidelRequires cookie*
 Title    Anisotropie Interaction Potentials for He-Pyrrole, He-Furane and He-Thiophene from total Differential Cross Section Measurements  
 Abstract    Differential cross section measurements are reported for scattering of an improved He-atomic beam by crossed beams of Pyrrole, Furane and Thiophene. The damping of the DCS diffraction oscillations is used to extract reliable anisotropic intermolecular potentials, applying the infinite order sudden approximation (IOSA). 
  Reference    Z. Naturforsch. 52a, 317—322 (1997); received September 19 1996 
  Published    1997 
  Keywords    Molecular Beams, Helium, Interaction Potentials, Aromaticity, Heterocyclic Compounds 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0317.pdf 
 Identifier    ZNA-1997-52a-0317 
 Volume    52 
2Author    Hans-Ulrich Hummel, Richard Fackler, Peter RemmertRequires cookie*
 Title    Zur Kenntnis neuer supraleitender Einlagerungsverbindungen von organischen Fünfring-Heterocyclen in 2 H-Tantaldisulfid New Superconducting Intercalation Com pounds of Organic Five-Membered Heterocyclic Com pounds with 2 H-Tantalum Disulfide  
 Abstract    The intercalation compounds TaS2(pyrrole)05 (1), TaS2(2-methylpyrrole)0 33 (2), TaS2(2,5-di-methylpyrrole) (3), TaS2(thiazole)0 33 (4) and TaS2(imidazole)033 (5) are formed readily in closed systems at temperatures up to 200 °C. Furane and thiophene show no tendency to inter­ calate in 2 H -T a S 2. Compounds 2 -5 are molecular intercalation species, and deintercalation is finished at 350 °C, while in 1 the pyrrole guests have been associated and thermally induced deintercalation proceeds up to 900 °C with fragmentation. 1 -5 can be indexed on the basis o f hexagonal symmetry assuming the space group P 6 3/mmc. In 1 the stacking sequence o f the host lattice TaS2 remains unchanged while in 2, 3 and 5 a transformation from the BaB CaC stacking o f 2 H -T a S 2 to a sequence AbA AcA occurs. In 4 a stacking CbC BcB like in M oS2 is realized. 1 -5 show superconducting behaviour at low temperatures, 2 exhibits a pronounced metall-semiconductor transition at 220 K. 
  Reference    Z. Naturforsch. 47b, 741—7 (1992); eingegangen am 8. Oktober 1991 
  Published    1992 
  Keywords    Tantalum disulfide, Intercalation Compounds, Heterocyclic Compounds 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-0741.pdf 
 Identifier    ZNB-1992-47b-0741 
 Volume    47