The dipole moments and association constants of some acid–base complexes in benzene solution

Abstract

Dielectric constant methods have been used to re-evaluate the dimerisation constant of acetic acid in benzene solution, and to study complex formation between acetic acid and pyridine, 4-picoline, 2,6-lutidine, and quinoline. Evidence is obtained that the complexes formed are of the hydrogen-bonded type without proton transfer, and that the cis-conformations are preferred except in the cases of 2,6-lutidine where steric considerations may be significant.