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'Cyclohexaselenium' in keywords Facet   Publication Year 1991  [X]
Facet   section ZfN Section B  [X]
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1Author    Rüdiger Staffel, Ulrich Müller, Andreas Ahle, K. Urt DehnickeRequires cookie*
 Title    Die Kristallstruktur von [Na(12-Krone-4)2+l2Se82 * (Se6, Se7) The Crystal Structure o f [Na(12-Crown-4)2+]2Se82 -(Se6, Se7)  
 Abstract    The title com pound was prepared from sodium polyselenide and 12-crown-4 in D M F solution in the presence o f cerium(IlI)chloride in the form o f black needles. The crystal structure determination by X-ray diffraction shows a partially disordered structure, in which the anionic units Se82-■ Se7 and Se82- • Se6 are present in the ratio 0.72/0.28. These units are as­ sociated to layers parallel to (1 0 0); the layers alternate with pseudohexagonal layers o f [N a(12-crown-4)2]+ ions. Space group P i, Z = 2, 3903 observed unique reflections, R = 0.114, w R = 0.084. Lattice dim ensions at -6 5 °C: a = 1247.9(3), b = 1367.8(8), c = 1660(1) pm, a = 94.65(5), ß = 98.94(3), y = 91.10(3)°. 
  Reference    Z. Naturforsch. 46b, 1287—1292 (1991); eingegangen am 8. April 1991 
  Published    1991 
  Keywords    Octaselenide, Cycloheptaselenium, Cyclohexaselenium, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1287.pdf 
 Identifier    ZNB-1991-46b-1287 
 Volume    46