Moreover, when considering the evolution of the T/C-ratio as a function of heating time, it is interesting to notice the highest T/C-ratios after short heating periods, in particular at the lowest heating temperature (80 °C).
As heating continues, T/C-ratios become lower. The higher T/C-ratios observed at the lower
heating temperatures (80 and 90 °C) are connected with the lower free energies of activation for the formation of transisomers.
However, the reaction is thermodynamically controlled because of the higher stability (less free energy) of the cisisomers, and therefore, the T/C-ratio declines as a function of reaction time.