iodide and picrate, tri-p-tolylselenonium chloride and iodide, di-m-tolyl selenide, di-m-tolyl selenium dichloride, tri-m-tolylselenonium iodide and tri-?M-tolylselenonium chloride-mercuric chloride.3. Triphenylselenonium hydroxide has been prepared in dilute solution. The solution when concentrated decomposes into benzene (?) and diphenyl selenium oxide.4. The formation of triphenylselenonium chloride by fusing di-p-tolyl selenide with mercury diphenyl and the thermal decomposition of diphenylp-tolylselenonium iodide into phenyl iodide and phenyl p-tolyl selenide indicate the p-tolyl group to be more negative than the phenyl.
Para-cresol was benzylated by both the Claisen and the aluminum chloride methods and the yields were compared.Bromination of 2-benzyl-4-methylphenol gave 6-bromo-2-benzyl-4methylphenol, which was also prepared from 6-bromo-4-methylphenol by the Claisen reaction.
STUDIES IN THE CHLOROPHYLL SERIES. IV 359 H (IIA) (CH8)2C=CH2 + (CH8)8CCH2C=CH ->-(CH8)8CCH=CCH2C(CH,)8 I ¿h8 1 ¿I :h, (IIIA) Same as III
ConclusionsFrom the data thus obtained, it appears that the hydrocarbon, known as tri-isobutylene, prepared by the action of sulfuric acid on tertiary butyl alcohol exists in at least three isomeric forms. These olefins are present in an approximate ratio of two moles of pentamethyl-2,2,4,6,6-heptene-3,4 (formula II) and one mole each of trimethyl-2,4,4-ieri.-butyl-3-pentene-2,3 (formula I) and dimethyl-4,4-neopentyl-2-pentene-1,2 (formula III). It also seems apparent that during hydrolysis of the ozonide the hydrocarbon of formula I undergoes a pinacolone rearrangement instead of breaking down into two simple ketones.
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