Abstract
LONDON. Chemical Society, March 21.—Prof. Thorpe, president, in the chair.—The following papers were read:—Researches on morphine, part ii., by S. B. Schryver and F. H. Lees. The authors have previously shown that bromomorphide is decomposed by water with formation of isomorphine, a base isomeric with morphine; it is now shown that another isomeride, β-isomorphine, is also produced in small quantity. Phosphorus trichloride converts codeine into chlorocodeide, which corresponds with bromomorphide and is convertible into isocodeine, a base isomeric with codeine.—The constitution of pilocarpine, part ji., by II. A. D. Jowett. Bromine acts upon isopilocarpine with formation of dibromoisopilocarpine perbromide and small quantities of monobromoisopilocarpine and isopilocarpinic acid; the latter is an oil of the composition C11H16O4N2. On oxidising dibromoisopilocarpine with permanganate, pilopinicacid, C8H11O4N, and pilopic acid, C7H10O4, are obtained. At 100°, in presence of water, bromine acts on isopilocarpine with production of dibromoisopilocarpinic, monobromoisopilocarpinic, bromopilopinic and bromopilopic acids.—The chemical action of Bacillus coli communis and similar organisms on carbohydrates and allied compounds, by A. Harden. The author has examined the products of the action of B. coli communis and B. typkosus on carbohydrates, and notes that the production of alcohol by the former organism appears to depend on the presence of the group CH2(OH).CH.OH in the compound to be fermented.—Action of dry silver oxide and ethyl iodide on benzoylacetic ester, deoxybenzoin and benzyl cyanide, by G. D. Lander.—Alkylation of acylarylamines, by G. D, Lander. Dry silver oxide and ethyl iodide convert the acylarylamines into the imino-ether, whilst if methyl iodide is substituted for ethyl iodide, a mixture of the imino-ether and the acylalkylamine usually results.—The preparation of aliphatic imino-ethers from amides, by G. D. Lander.—Note on the latent heats of evaporation of liquids, by H. Crompton.—On the atomic weight of lanthanum and on the error of the “sulphate method” for the determination of the “equivalent” of the rare earths, by B. Brauner and F. Pavliěek. It is shown that in the conversion of lanthanum oxide into sulphate for atomic weight determinations, small quantities of acid sulphate are produced and cause error in the determination of the equivalent; it is further shown that lanthanum, as hitherto known, is a mixture of two earth metals in which the true lanthanum of atomic weight 139.0 predominates.—On the atomic weight of praseodymium, by B. Brauner. The author has determined the atomic weight of praseodymium by four methods and made ebullioscopic determinations with the chloride in alcohol solutions; the final atomic weight of praseodymium is given as 140.94.—On praseodymium tetroxide and peroxide, by B. Brauner. Praseodymium tetroxide, Pr2O4, is obtained as a black powder, by fusing the nitrate with nitre and on treating praseodymium nitrate with hydrogen peroxide the hydrate of praseodymium peroxide, Pr2O5, is produced.—Note on neodymium, by B. Brauner. The number 143.5 was found by the sulphate method for the atomic weight of neodymium; this metal gives a tetroxide, Nd2O4, and a peroxide, Nd2O5.—Contribution to the chemistry of thorium, by B. Brauner. The author concludes that thorium does not consist of a single element because on fractional hydrolysis of ammonium thorium oxalate, fractions are obtained in which the atomic weight of the metal varies from 220 to 232.—Pheno-α-ketoheptamethylene and its derivatives, by F. S. Kipping and A. E. Hunter. Pheno-α-ketoheptamethylene is obtained by the action of aluminium chloride on phenylvaleric chloride; its oxime is reducible to pheno-α-aminoheptamethylene,??? —Note on diphenyldinitroethylene, by J. J. Sudborough.—Para- and ortho-cyanohydroxy-derivatives of pyridine, by J. Moir.
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Societies and Academies . Nature 63, 626–628 (1901). https://doi.org/10.1038/063626b0
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DOI: https://doi.org/10.1038/063626b0