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'Single Crystals' in keywords Facet   Publication Year 1980  [X]
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1Author    Hans-Ulrich Kreusler, Achim Förster, Joachim FuchsRequires cookie*
 Title    Die Struktur des Rubidiumtrimolybdathydrats Rb2Mo3O10 * H20 The Structure of the Rubidiumtrimolybdate Hydrate Rb2Mo3Oi0 * H20  
 Abstract    For the first time single crystals of tri-molybdate were obtained through a slow trans-formation of the primary precipitate in a slightly acidified solution of rubidium molybdate at a temperature of 70 °C. A structural analysis of Rb2Mo30io • H20 revealed that the anion forms a chain with a hexameric identity period built up from MoOg octahedra. Each Mo atom is bonded with two terminal oxygen atoms. The anion doesn't contain OH groups. 
  Reference    Z. Naturforsch. 35b, 242—244 (1980); eingegangen am 3. September/8. November 1979 
  Published    1980 
  Keywords    Trimolybdate, Single Crystal, Preparation, X-ray 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0242_n.pdf 
 Identifier    ZNB-1980-35b-0242_n 
 Volume    35 
2Author    Wolfgang Flossmann, Herbert Zehner, Adolf MüllerRequires cookie*
 Title    Radicals Produced in Single Crystals of Thymine Derivatives by UV and X-Rays  
 Abstract    Single crystals o f anhydrous thym ine (T), thym ine monohydrate (T ■ H 20) , 5,6-dihydrothym ine (T H 2), 1-methylthymine (mT) and thym idine (dT) were irradiated with X-rays and UV between 77 K and 300 K. Six types o f radicals were analyzed by ESR-spectroscopy at 9.5 G H z and 35 G H z after exposure to X-rays. The anion radical occurred only in T • H 20 at 77 K, the 4-yl radical only in T H 2 at 77 K and the 1-yl radical only in T between 77 K and 300 K. The 6 -yl radical was found in T, T H 2 and mT. It was converted into the 5-yl radical irreversibly by heat or white light (A < 600 nm). The 5-yl radical appeared in all compounds at room temperature. The highest thermal stability was found for the 7-yl radical which was present at room temperature in all compounds except T H 2 . U V -irradiation (A = 320 nm) produced radicals only in three crystals (T, T H 2 , dT). In T the 5-yl radical was found after exposure at 300 K, and two other radicals, 1-yl and 7-yl, at 77 K. A lso at 77 K, the 7-yl radical was present in dT and the 5-yl radical in TH 2 and dT. 
  Reference    Z. Naturforsch. 35c, 20—2 (1980); received July 23 1979 
  Published    1980 
  Keywords    Radicals, Single Crystals, Thym ine, X-Rays, ESR 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0020.pdf 
 Identifier    ZNC-1980-35c-0020 
 Volume    35