par Brunel, Y.;Coulombeau, C.;Lavaitte, S.;Reisse, Jacques 
Référence Journal of physical organic chemistry, 4, 2, page (113-120)
Publication Publié, 1991-02
Référence Journal of physical organic chemistry, 4, 2, page (113-120)
Publication Publié, 1991-02
Article révisé par les pairs
| Résumé : | Overall and internal rotation can be studied by means of relaxation time measurements on carbon-13. Diffusion constants associated with overall rotation and internal rotation can be used to quantify the intermolecular and intramolecular motional constraints. During the course of the study, a very careful examination of monomethyl and dimethylnorbornanes was performed and the results were compared with data obtained by neutron inelastic scattering. This study led to a clear conclusion concerning the real usefulness of relaxation time measurements as a very good alternative method for the determination of entropy contributions, which are usually calculated on the basis of vibrational studies. |
