A method for forming dihydroDicyclopentadiene comprises mixing a source of
dicyclopentadiene with at least one solvent and at least one reactive
component in the presence of a source of hydrogen and a selective
hydrogenation catalyst, the solvent and reactive component being readily
separable from dihydroDicyclopentadiene, and the reactive component and
catalyst favoring the formation of dihydroDicyclopentadiene over tetra
hydro dicyclopentadiene.