Vol. 67 and a slow stream of carbon dioxide-free, dry nitrogen (or oxygen) was bubbled through the liquid, passed from there through two Dry Ice traps into a Dehydrite tube and finally into an Ascarite tube, the open end of which was protected by a soda-lime tube. The reaction vessel was kept at the boiling point of benzene for sixteen to twenty hours, then the system was swept with nitrogen for several hours until the Ascarite tube ceased to gain weight. Constancy was always attained in less than two hours. The values are corrected for small fractions of peroxide remaining undecomposed in solution after the heating period.Carbon dioxide was eliminated from the tank nitrogen by scrubbing with 50% aqueous potassium hydroxide in a spiral wash bottle and drying with calcium chloride.Details of the kinetics of polymerization and of the molecular weight determinations will be presented in a paper immediately following.

Orange-redClusters of needles 100 160-161" 15.05 15. 12 2-Pyrimidyl Acet. + ale. Yellow-orange Cluster of prisms 99 208-209' 18.26 18.36 Acetylguanyl Ale. + petr. ether Orange Fine needles 87 24618.02 18.14 " Acetylation of 4-(3 '-methyl-4 '-hydroxynaphthylazo) -benzenesulfonamide. 6 Acetylation of 4-(3 '-methyl-4 '-hydroxynaphthylazo) -N-acetylbenzenesulfonamide. " Acetylation of 4-(3 '-methyl-4 '-aminonaphthylazo) -benzen esulf onamide. d Acetylation of 4-(3'-methyl-4'-ammonaphtiiylazo)-N-acetylbenzenesulfonamide. "Two polymorphic forms m. p. 280°and m. p. 218°yielded the same acetyl derivative. f Two polymorphic forms m. p. 283°and m. p. 248-249°y ielded the same acetyl derivative.

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