Polyalkylindanes of the type described in earlier communications 1, may also be prepared by condensation of styrenes and alkenes under the influence of suitable catalysts 3. ... In a publication dealing with the cycloalkylation of p-cymene with tert. amyl alcohol using sulphuric acid as catalyst, it was shown that the reaction led to polyalkylindanes. The reaction mechanism involved a hydrogen transfer in which p-cymene acted as the donor and an isoamyl carbonium ion ...