par Barbieux, Monique 
;Defay, Nicole ;Pecher, Jacques ;Martin, Ricardo
Référence Bulletin des Sociétés chimiques belges, 73, 7-8, page (716-730)
Publication Publié, 1964
;Defay, Nicole ;Pecher, Jacques ;Martin, RicardoRéférence Bulletin des Sociétés chimiques belges, 73, 7-8, page (716-730)
Publication Publié, 1964
Article révisé par les pairs
| Résumé : | The N.M.R. spectra of five pairs of 4 alkoxy‐α, β‐dialkylstyrenes of known configuration (general formulae XI and XII) are compared and a set of rules suitable for geometric configuration assignment in such compounds is deduced: The strong signals in the aromatic A2B2 methoxystyrene system are 25‐30 c/s apart in the cis isomer and only 13‐16 c/s in the trans isomer. The olefinic and allylic protons signals are shifted 7‐20 c/s downfield in the cis isomer. The origin of the observed shifts is discussed. The configuration of ten new styrene compounds is elucidated by application of these rules. Copyright © 1964 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim |
