Calorimetric investigations of association in ternary systems. Part 1.—Enthalpy of complex formation of benzoic acid with proton acceptors

Abstract

The procedure for determining the enthalpy of donor–acceptor complex formation in systems in which one of the components is strongly dimerized is presented.

The proposed method makes use of the values of equilibrium constants (K₁) of dimerization and of complex formation (K₂) obtained by spectroscopy as well as calorimetric measurements of the heat of solution. The values of complex formation enthalpy of benzoic acid with proton acceptors have been determined.