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- W2034674942 abstract "Une étude conformationnelle par analyse vibrationnelle du cyclopentane et de ses dérivés halogénés est entreprise à partir des spectres de diffusion Raman à très basse température et des spectres d'absorption infrarouge des molécules dispersées dans une matrice d'argon à 10 °K. Le calcul est effectué pour les différentes conformations possibles; seule la conformation de symétrie Cs halogène en position axiale conduit à un accord entre fréquences calculées et observées, les dérivés halogénés du cyclopentane cristalliseraient donc sous cette forme. Un champ de forces transférable d'un composé à l'autre est déterminé ce qui confirme l'hypothèse d'une correspondance entre les fréquences de vibration de ces différentes molécules. A conformational study by vibrational analysis of cyclopentane and halogenocyclopentanes is performed on the basis of the Raman spectra at a very low temperature and the infrared spectra of these molecules trapped in a rigid matrix. The various possible conformations are studied and compared. Only for the form with Cs symmetry and axial halogen is there good agreement between calculated and experimental frequencies. Thus the cyclopentyl monohalides are expected to crystallize in this form. A transferable force field is derived for cyclopentane and the cyclopentyl halides, which confirms the hypothesis of a correlation between the vibrational frequencies of these molecules." @default.
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- W2034674942 date "1972-01-01" @default.
- W2034674942 modified "2023-09-23" @default.
- W2034674942 title "Conformation et spectres de vibration des dérivés halogénés du cyclopentane à basse température" @default.
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- W2034674942 doi "https://doi.org/10.1016/0022-2860(72)85221-9" @default.
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