“…Low molecular weight compounds, styrene (monomer), toluene, ethylbenzene, a-methylstyrene, and 2-phenylpropene-1, were purified by distillation of the carefully dried liquids over sodium. The solvents used, carbon tetrachloride and ethanol, were purified according to the method given by Weissberger (11). The degree of purity of all these substances was checked by comparing their physical constants with those given in the literature.…”