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1989 (1)
1Author    W. S. Sheldrick, H. G. BraunbeckRequires cookie*
 Title    Preparation and Crystal Structure of Cs4Se16  
 Abstract    The cesium polyselenide Cs4 S e 16 has been prepared by the m ethanolotherm al reaction o f Cs2 C 0 3 and Se at 160 °C and 13 bar. [S e16]4-fragments may be regarded as containing an Se6 ring with Cs symmetry and two Se5 chains related by the crystallographic mirror plane. S e4 o f the six-m em bered ring, which displays a square planar geom etry, participates in two relatively long S e 4 —Se5 bonds [2.989(4) A ] to individual chains. The /rans-sited S e 4 —Se3 bonds [2.425(4) Ä] are markedly longer than the remaining S e -S e bonds in the Se6 ring [2.344(4), 2.356(4) Ä ]. Further Se —Se interactions o f length 3.132(4) and 3.346(4) Ä are observed betw een individual [Sel6]4~ fragments. 
  Reference    Z. Naturforsch. 44b, 1397—1401 (1989); eingegangen am 26. Mai 1989 
  Published    1989 
  Keywords    Cesium P olyselenide, M ethanolotherm al Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-1397.pdf 
 Identifier    ZNB-1989-44b-1397 
 Volume    44