The complexation reactions of some primary and secondary amines with crown ethers have been studied by means of calorimetric titrations. Thus, the stability constants and values of the reaction enthalpies and entropies were obtained. The values of the stability constants are nearly identical in all solvents examined. However, the values of the reaction enthalpies and entropies are influenced by solvation effects. In non-polar solvents such as toluene, cyclohexane, and carbon tetrachloride, complex formation with the amines is only favoured by entropic contributions. The values of the reaction enthalpies are rather small and nearly identical in these solvents.