1 | Author | Herbert Meier, Hansjörg Gugel, Margret Barth, Udo Plücken | Requires 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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