Tricyclodecane

Tricyclodecane (TCD) is an organic compound with the formula C10H16. It is classed as a hydrocarbon. It has two main stereoisomers–the endo and exo forms. Its primary use in the exo form is as a component of jet fuel. It is used here primarily because of its high energy density. The exo isomer also has a low freezing point. Because of this, its properties have been studied extensively. It is often called tetrahydrodicyclopentadiene.

Reactions
Its reactions with other materials has been studied, as have various production methods. The two isomers can interconvert in the presence of aluminum chloride as catalyst absorbed on substrates such as silicon dioxide or zeolites,   with preference for forming the exo as the major product.