Solvent effects on molecular interactions in 2-amino- and 3-amino-pyridine–molecular iodine–solvent systems

Abstract

Equilibria in 2-amino- and 3-amino-pyridine–molecular iodine–solvent (cyclohexane, carbon tetrachloride, benzene, or chlorobenzene) systems have been studied by electronic spectroscopy. The heats of solution (ΔH_s) of the amines and the heats of complexation with l₂(ΔH_c) have been measured by a calorimetric method. The results have been interpreted in terms of the solvent dependence of the ΔG_c, ΔH_c, and ΔH_s values obtained, and compared with data for other pyridine derivative–l₂–solvent systems.