| Popis: |
Les spectres Raman de la 2-pentanone ont ete enregistres a l'etat liquide, solide et vapeur. Le spectre a basse temperature presente un nombre limite de raies du a la disparition de toutes les especes rotameres exceptee l'espece la plus stable. De la variation en temperature de certains groupes de raies, il est possible de determiner la difference d' enthalpie entre chaque espece rotamece rotamere dans la phase liquide. Raman spectra have been obtained for 2-pentanone in the liquid, solid and vapor state. The low temperature spectrum undergoes a simplification due to the disappearance of all the rotational isomers, except the most stable. From the temperature dependence of band groups, the enthalpy difference between the rotational isomers was obtained in the liquid phase. |
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