par Mathur, Raj 
Référence Spectrochimica Acta Part A: Molecular Spectroscopy, 28, 7, page (1451-1457)
Publication Publié, 1972-07
Référence Spectrochimica Acta Part A: Molecular Spectroscopy, 28, 7, page (1451-1457)
Publication Publié, 1972-07
Article révisé par les pairs
| Résumé : | The differences in thermodynamic properties of association [(ΔΔH°)A, (ΔΔS°)A, and (ΔΔG°)A] between the equatorial and axial isomers have been determined for two epimeric pairs of alcohols: trans- and cis-4-t-butylcyclohexanol and trans-cis- and trans, trans-2-decalol in CC14 solvent. The results obtained show that for autoassociation, a greater enthalpy diminution for the equatorial isomer, as shown by the value (ΔΔH°)A = -1.4 ±0.5 kcal/mole is an important factor in promoting the relatively higher stability of the equatorial isomer as compared to the axial. In the case of association with DMSO, however, the value of (ΔΔH°)A is equal to zero. This may be attributed to the absence of selective stabilization of equatorial and axial isomers when the alcohol serves only as a proton donor, even if the acceptor molecule is a strong proton accepting base such as DMSO. © 1972. |
