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1989 (2)
1Author    Gabriele Rebera, Jürgen Riede3, Nils Wibergb, Gerhard Wagnerb, Gerhard MüllerRequires cookie*
 Title    Silaheterocyclen: Molekülstruktur eines 3-Oxa-2  
 Abstract    ,4,6,7-tetrasiIabicycIo[3.1.1]heptans Silaheterocycles: Molecular Structure of a 3-Oxa-2,4,6,7-tetrasilabicyclo[3.1.l]heptane A ccording to an X-ray structure analysis l,5-b is(di-rm -butylrnethylsilyl)-2,2.4.4,6.6,7,7-octa-m ethyl-3-oxa-2,4,6,7-tetrasilabicyclo[3.1. l]heptane (1) is a rigid bicyclic m olecule consisting o f a 1,3-disilacyclobutane ring whose 2,4 positions are bridged by a M e:Si —O —SiM e: fragment. The four-m em bered ring is non-planar with a dihedral angle o f 33.8° along the C —C axis. The intraring valence angles at carbon are significantly smaller than those at silicon leading to a transannular Si • • • Si distance o f only 2.558(1) Ä (triclinic, space group P I with a = 9.125(2), b = 12.668(2), c = 15.499(3) Ä , a = 101.25(1), ß = 87.87(1), y = 96.88(1)°. V = 1744.4 Ä 3, R (w R) = 0 .0 4 4 (0 .0 5 1) for 316 refined parameters and 5156 observables). 
  Reference    Z. Naturforsch. 44b, 796—799 (1989); eingegangen am 17. März 1989 
  Published    1989 
  Keywords    Crystal Structure Cyclic D isiloxane, 1, 3-Disilacyclobutane 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0796.pdf 
 Identifier    ZNB-1989-44b-0796 
 Volume    44 
2Author    D. Ieter Fenske, Christina Ergezinger, Kurt DehnickeRequires cookie*
 Title    Crystal Structure of l,l-D ichloro-3,5- diphenyl-4-H-l,2.4,6-/.4-selenatriazine, SeCl2C2N 3H (C 6H 5)2  
  Reference    Z. Naturforsch. 44b, 857—8 (1989); eingegangen am 15. Februar 1989 
  Published    1989 
  Keywords    1, l-D ichloro-3, 5-diph en yl-4-H -l, 2, 46-Ä4-selenatriazine, Preparation, Crystal Structure 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-0857_n.pdf 
 Identifier    ZNB-1989-44b-0857_n 
 Volume    44