Abstract
LONDON Chemical Society, November I.—Dr. Gladstone in the chair.—The following papers were read:—On some hydrocarbons obtained from the homologues of cinnamic acid, by W. H. Perkin. These hydrocarbons were prepared either by heating the acids or by treating the hydrobromo acids with bases. The following acids were prepared and examined:—Hydrobromocinnenylacrylic, hydrobromocinnenylcrotonic, hydrobromocinnenylangelic. The following hydrocarbons were obtained:—Isopropylvinylbenzene, isopropylallylbenzene, isopropylbutenylbenzene, allylbenzene, and butenylbenzene; the dibromides of these bodies were also prepared and examined.—On anethol and its homologues, by W. H. Perkin. By heating methylparoxyphenylacrylic acid, vinylic anethol was obtained, similarly allylic or ordinary anethol and butenylic anethol were prepared. In conclusion the author discusses the formation of the hydrocarbons from the hydrobromo acids, and concludes that they are formed simply by the separation of hydrobromic acid and carbonic anhydride.—On two new methods for estimating bismuth volumetrically, by M. M. P. Muir. To a solution of bismuth in nitric acid an excess of sodium acetate is added, and then a measured volume of standard sodium phosphate solution also in excess; the bismuth is precipitated, the precipitate filtered off, and the excess of phosphoric acid determined in the filtrate by uranium acetate. The other method given does not yield such accurate results.—On the oxidation of ditolyl, by T. Carnelly. By the oxidation of solid ditolyl the author obtained diparatolylphenylcarbonic acid and diparadiphenyldicarbonic acid; liquid ditolyl yielded orthoparatolylphenylcarbonic acid, orthoparadiphenylcarbonic acid, and finally terephthallic acid.—On a new manganese reaction, by J. B. Hannay. If a solution of a manganous salt in strong nitric acid is warmed in the presence of an iron salt with some crystals of potassic chlorate, the iron and manganese are precipitated as a double manganate of iron and manganese. The author proposes this reaction for separating iron from aluminium, &c.
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Societies and Academies . Nature 17, 40 (1877). https://doi.org/10.1038/017040a0
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DOI: https://doi.org/10.1038/017040a0