Abstract:131 Bezogen auf die .,lange", nichttrivlale Symmetrieebene, die mil der einzigen molekularen Symmetrieebene in (21 msammenfallt.[4] Aus dem PE-Spektrum der Modellverbindung (Sj, X = CH2, entnommen.Wir danken Prof. A. Schweig, Marburg, fur dieses Spektrum.
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Alexander-von-Humboldt-Stiftung (Stigendium fur D. D. D.) unterstiitzt. Angew. Chem. 92 (1980) Nr. 8 0 Verlag Chemre, GmbH, 0-6940 Weinheim, I980
Fundamental differences with regard to bicycloconjugation exist between the structurally related systems (1) and (2), X = NH. (1) is bicycloconjugated, whereas (2) is not, entirely in keeping with theoretical predictions.
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