Journal of the Chemical Society 1906/I. [antikvár]

JOURNAL op THE CHEMICAL SOCIETY. ABSTRACTS OF CHEMICAL PAPERS PUBLISHED IN BRITISH AND FOREIGN JOURNALS. PART I. Organic Chemistry. Bromine Derivatives of Tetrametbylmethane. Peteu Poni {Ann. sci. Univ. Jassy, 1905, ,3, 212—216).—Below 0°, the interaction in diffuse daylight between water, bromine, and /8/3-dimethylpropane containing some /8-methyIpropane requires from four to fourteen days according to the intensity of the light. In addition to /8-bromo-j8-methylpropane, the following substances were isolated by fractional distillation under reduced pressure. a-Bromo-jS^-dimethylpropane, CMe3'OH2Br, is a colourless liquid with an ethereal odour, which boils at 89—91° under 749 mm. pressure. It has the sp. gr. 1'294 at 070° and n^ 1-43689 at 20-4°. /3-Bromo-^-methylbutane has been obtained previously by Tissier. aa.-Dibromo-^^-dimethylpropane, CMeg'CHBrg, is a colourless liquid with a strong ethereal odour, which boils at 64—65° under 43 mm. and decomposes when heated under the ordinary pressure. It has the sp. gr. 1-7883 at 0°/0° and n^y 1-50848. ay-Dibromo-p^-dimethylpropane, CHaBr-CMea'CHgBr, boils at 82—83° under 49 mm. and decomposes when heated under the ordinary pressure, has the sp. gr. 1-7052 at 0/0°, and n^y 1-50903 at 20-3°. The constitution of the last two isomeric compounds is deduced from the law that the boiling point of a disubstituted derivative is the lower the nearer the substituents are together (Henry). C. S. VOL. XC. i. h