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'Ring Inversion' in keywords
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1985 (1)
1980 (1)
1Author    Herbert Meier, Hansjörg Gugel, Margret Barth, Udo PlückenRequires cookie*
 Title    Konformationsuntersuchungen an benzokondensierten Achtringen Conformation Analysis of Benzo-Condensed Eight-Membered Rings  
 Abstract    The annellation of 1-4 benzene rings to carbocyclic 8-rings increases stepwise the activation barrier for the ring inversion. A drastic consequence of the steric hindrance in the transition state is the rigidity of 9,10-dihydro-tribenzo[a,c,e]cyclooctenes at room temperature. With the aid of a complete analysis of the iH NMR spectra a decision is possible between fixed C2-conformations (e.g. 8) and Cs-conformations (e.g. 9). 
  Reference    Z. Naturforsch. 35b, 477—481 (1980); eingegangen am 13. Dezember 1979 
  Published    1980 
  Keywords    Ring Inversion, NMR Spectra, Lanthanoid Shift Measurements 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0477.pdf 
 Identifier    ZNB-1980-35b-0477 
 Volume    35 
2Author    Dieter Hellwinkel, Peter Ittemann, Siegbert BohnetRequires cookie*
 Title    Dibenzo  
 Abstract    [b,g]heterocin-5,7-dione Dibenzo[b.g]heterocine-5,7-diones 
  Reference    Z. Naturforsch. 40b, 858—859 (1985); eingegangen am 13. Februar 1985 
  Published    1985 
  Keywords    Dibenzo[b, g]heterocine-5, 7-diones, Synthesis, NMR Spectra, Stereochemistry, Ring Inversion 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0858_n.pdf 
 Identifier    ZNB-1985-40b-0858_n 
 Volume    40