ABSTRACT
When dealing with chemical processes of a closely allied nature, the error in small values of the thermodynamic functions of isomerization reactions determined by equilibrium studies is as a rule less than that in the respective parameters determined from calorimetric experiments. The quantitative analysis of isomer mixtures was performed by spectral and chromatographic methods, among which the nuclear magnetic resonance, gas-liquid chromatography, and ultraviolet methods have of late been used most extensively. Spectral analysis techniques are rapid, do not affect the chemical composition of the mixtures being analyzed, and are, therefore, adapted for analyzing processes noted for their low potential barriers. Functional isomerizations constitute the smallest group of isomer conversions investigated experimentally. The tables list, for the most part, tautomeric rearrangements of the functional isomerism type, such as lactim-lactam, imineenamine, cyanide-isocyanide, and some other rearrangements. The thermodynamic functions of configurational isomerization reactions are generally determined from equilibrium data.
