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The kinetic behavior of tetrahydrotricyclopentadiene (THTCPD) isomerization was studied by using two kinds of chlor- oaluminate ionic liquid (IL) catalyst with different Lewis acidity. THTCPD isomerization pathway was discussed under the different temperature and time as reaction parameters using IL catalysts consisting of 1-butyl-3-methylimidazolun chloride (BMIC)/AlCl3 with low acidity and pyridine hydrochloride (PHC)/AlCl3 with high acidity. The conversion of THTCPD iso- merization increased with increasing Lewis acidity of IL catalyst. The THTCPD isomerization pathway changed as a function of reaction temperature and catalyst acidity. In the case of BMIC/AlCl3 IL catalyst, THTCPD isomerization pathway was sim- ilar to that of using conventional AlCl3 catalyst. However, two different types of additional pathways (endo, exo, endo-NB → exo, exo, endo-NB → exo, exo, exo-NB and endo, exo, endo-NB → exo, exo, endo-NB → exo, exo, exo- CP) were appeared when using PHC/AlCl3 IL catalyst.

A Study on the Reaction Pathway for Isomerization of Tetrahydrotricyclopentadiene Using Ionic Liquid Catalyst