The compound 2-(2-benzofuryl) Δ-2 imidazoline, has been studied by DSC, TG, X-ray diffraction and thermomicroscopy.
We shall see that in the case of a study by DSC this compound presents a strange behaviour, which apparently is in contradiction
with the thermodynamic rules. In a case of monotropy, if we have the α-phase (stable) and the γ-phase (metastable), after
melting and cooling only theα-phase could crystallise. But this compound can give, according to the rate of cooling, theγ-phase
metastable. The rate of cooling is of fundamental importance and the monotropic behaviour of this compound will be explained
using the Gibbs function G=f(T) for P=1 atm.