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1980 (1)
1Author    Joachim Firl, Heinz Braun, Anton Amann, Robert BarnertRequires cookie*
 Title    und Bindungsverhältnisse von Enaminosulfoniumsalzen Dynamic Behaviour, Conformation and Bonding of Enaminosulfonium Salts  
 Abstract    The rotational barriers about the C-N single bond of the enaminosulfonium salts 1-6 are measured. Their magnitudes are related to the jr-donor strength of the NR2 group. For the unsymmetrically substituted compounds 7-12 the rotational equilibria are determined. In the case of the monoalkyl compounds 7-10 the more crowded s-cis-rotamers turn out to be the more stable conformations. Furthermore, the 13 C chemical shifts of the sulfonium salts 1-16 are reported. The shift differences ö(s-cis-s-trans) for the a-carbons of the N-alkyl groups seem to depend on the dihedral angle between the vinyl group and the C-H(°-c > bonds. Moreover, the spectra reveal that enaminosulfonium salts posses a high degree of ylide character. 
  Reference    Z. Naturforsch. 35b, 1406—1414 (1980); eingegangen am 20. Juni 1980 
  Published    1980 
  Keywords    Enaminosulfonium Salts, 13 C NMR Spectra, Rotational Barriers, Rotational Equilibria, Ylide Character 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1406.pdf 
 Identifier    ZNB-1980-35b-1406 
 Volume    35