Abstracts

1885 Journal of the American Chemical Society  
A new investigation of this compouiid shows many errors in the accounts of earlier investigators. Careful analyses were made to prove the purity of the gas. I t is yellowish-brown and in the liquid form dark-brown. It is not easily decomposed by sunlight, nor does it explode when evaporated a t ordinary temperatures if organic matter is exclrtded. Concentrated aqueous solutions a r e colored golden-yellow. The gas has an extremely unpleasant odor and attacks the respiratory organs. Two
more » ... rgans. Two determinations of its vapor density gave 43.69 and 43-42, Under a pressure of 737.9 m. m. it boils a t 5,Oo-5.l0. It causes a partial decomposition of calcium chloride into calcium hypochlorite, which the authors propose to investigate. (Amulen der C'hemie, 230, 27'3.) F. P. V. SCHACHERL. Solidification. E. REYER. The phenomena of solidification of lavas and metals are briefly pointed out. The accompanying crystallization, pulverization and contraction are discussed. The interpretation of the observed facts does not support Mallet's theory, as to the contraction of the earth. (Jovr. prakt. Chem., 32, 120.) E'. P. v. Purification of Sulhpuric Acid. M. KUPFERSCHLAGER. The author reduces the arsenic acid to arsenious by the means of gaseous sulphur dioxide, which is passed through the acid diluted with its weight of water. He then precipitates arsenic, lead and selenium by HZS, passed t o saturation, and allows the precipitate to settle in a closed vessel. The acid is decanted into a retort, in communication with a tubulated receiver, the tubulure being directed downwards into the wide mouth of a glass jar. The retort rests upon a cold sand bath and is surrounded b y a double, circular grate filled with cold coke on top of which is ignited coal. The top of the retort is covered by a sheet iron dome. The jar does not need artificial cooling. ( B U E . SOC. chin(., 44,353.) 31. L. ABSTRACTS : ORGANIC CHEMISTRY. 245 ORGANIC CHENISTRY. On Cyanogen Compounds of the Aromatic Orthodiamines. J. A. BLADIN. Cyanogen combines easily with aromatic orthodiamincs (1 mol. C N and 1 mol. diamine) to form compound9 having the general formula C, HZnp8N4 (where n18.9, etc.), which are more stable than the cyanogen compounds of monamines. They are very strong bases, forming with acids two series of salts, containing 1 or 2 mols. of a monobasic acid. On heating these compounds on the water-bath with HCI, an NH group is split off and replaced by an oxygen atom C,H"_,N, + H, O=C,Hz n-N 0 + NH, The oxygen compounds so obtained arc likewise bases, but weaker than those from which they arc derived. Tliey unite with 1 mol. of a monobasic acid to form salts which are easily deconiposed by water. They likewise have the character of weak acids, as they are soluble in KOH, but are precipitated therefrom by C O , , etc. Benzoyl chloride on being heated with dimethylaniline for some time at 190' gave benzoylmonomethylaniIine. Large, clear crystals melting at 63'. Benzoylmonethylaniline was likewise obtained from benzoyl chloride and diethylaniline. Crystals similar to those of the previous compound, melting a t 8 0 ' . Benzoylmonomethyl-a-naphthylamine was obtained from dimethyl-a-naphthylamine. Light colored crystals. , Melting point 121". ( B e y . d. chem. Gesell., 1885, 685.) Benzyl ethers of the brominated nitrophenols, and their behavior by reduction. G. ROLL and 0. HOLZ. Monoand dibrom-o-nitrophenol and mono-and dibrom-p-nitrophenol were used in this research. The benzyl ethers were formed by the action of benzyl chloride upon the salts of the brominated nitrophenols. These were subjected to the action of tin and hydrochloric (Ber. d. chem. Gesell., 1885, 666.)
doi:10.1021/ja02130a617 fatcat:fckx5p53lvbtde4cc3q2adsqfy