(6) MJ Rosen, J. Org. CAsm,, IO, 1701 (1953).(7) A, Muller and K. Kormandy, J. Ow. Clum., 18, 1237 (1069).(8) BB Coraon, J. Domky, J. E, Nlokak, WM Kuta, end BI Tbam, J, Or#, Qhbm,, 19, 11 (10Qd1, by means of aqueous sulfuric and phosphoric acids. The over-all yield of dimer and higher is 96-98%, the higher polymer being essentially trimer. Styrene is dimerized in sulfuric acid at lower acid concentrations than phosphoric acid, but the latter ...