. Can. J. Chem. 55,2845Chem. 55, (1977 )). On utilise les energies de tension estimkes des ktats de transition approximatifs impliquts et l'analyse conformationnelle comme guide pour rationaliser les rtsultats. Cette approche devrait permettre de meilleures predictions concernant les produits de photolyse de systtmes qui sont reliCs dans les m&mes solvants. Les rapports de produits sont tres sensibles aux solvants et des expkriences prkliminaires indiquent qu'une amine primaire (cyclohexylamine) dans des photolyses en solution augmente la production de produit dkrive de cetene.[Traduit par le journal] Introduction fer. Thus substituents and conformational prefl-he photochemical reactions of saturated erences exert a significant influence on the prodcyclic ketones in solutioll have been studied ex-uct distribution. This product ratio is also sentensively (for pertinent reviews see ref. I), never-sitive to solvent and these effects may alter contheless many facets are still imperfectly under-formational factors. The study of relatively rigid stood, and as chapman and weiss have pointed bridged-ring ketones facilitates a better underout -the factors determining the relative yields standing of the conformational factors which
Bei der Photolyse der Bicyclooctanone (I), (IV), (VIII) entstehen von intermediär gebildeten Ketenen abgeleitete Produkte [nämlich a) die Ester bzw. b) die Carbonsäuren (II), (V), (IX)] sowie ungesättigte Aldehyde (III), (VI), (VII), (X).
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