| Popis: |
The association behaviour of four optically active secondary alcohols with chiral C atoms in the α-position was investigated by means of IR spectroscopy and calorimetry CCl 4 was used as a solvent. As compared to the racemic compounds, the corresponding optically active alcohols have slightly higher concentrations of free OH groups, i.e. lower degrees of association, but somewhat higher enthalpy of association. Consequently, the H -bonding of racemic alcohols is favoured by entropy. Differences have been found also in the absorption coefficients of the associated OH groups. Optically active solvents exert some influence on the association behaviour of optically active alcohols. No differences could be observed in the H-bonding of optically active monocarboxylic acids, as compared with the racemic ones |
