Etude conformationnelle de la dimethyl‐3,4 cyclopentanone trans: II—Spectres de RMN

Les spectres RMN de la dimethyl-3,4 cyclopentanone trans et de la dimethyl-3,4 tetradeuterio 2,2,5,5 cyclopentanone-trans ont ete analyses. Les constantes de couplage, determinees pour le compose deuterie, sont en faveur d'une conformation diequatoriale des groupements methyle. The NMR spectra of trans-3,4-dimethylcyclopentanone and trans-3,4-dimethyl-2,2,5,5-tetradeuteriocyclopentanone are analysed. The coupling constants, calculated for the deuterated compound, are in good agreement with a diequatorial conformation of the methyl groups.