Solubility Phenomena of Pyridine- and Pyrazine-monocarboxamides. II

Heats of Fusion of Picolinamide, Nicotinamide, Isonicotinamide, and Pyrazincarboxamide

Abstract

A recording adiabatic calorimeter was made on trial and heat of fusion was measured (Table I). The melting curve (Fig. 4) of pyrazine-monocarboxamide shows a shoulder at around 160°, prior to reaching the melting point, and suggests the presence of a transition point. This point was also mentioned in Part I of this series.