Items related to The nitrous acids of paraxylene
Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ... c.c. of concentrated hydrochloric acid in 100 c.c. of water was added. It was then boiled and the precipitated sulphur was filtered off. 0n evaporation of the filtrate the aminosulphonic acid came down in clusters of fine prismatic plates or needles which were slightly less soluble than the aminosulphonic acid already described. Yield,--2.6 g. Hydrolysis of the Sulphonchloride Which Melted at 74.50 and Subsequent Reduction of the Acid by Means of Stannous Chloride and Hydrochloric Acid. The concentrated solution of nitrosulphonic acid, prepared as in the preceding experiment by the hydrolysis of the sulphonchloride, was treated with 12 g. of stannous chloride and 6 c.c. of concentrated hydrochloric acid in 15 c.c. of water. A precipitate began to form almost at once. The mixture was allowed to stand twenty-four hours and then diluted to 2000 c.c. After precipitating and filtering the tin, in the usual manner, the solution was evaporated. The amino acid came down in the characteristic needlelike plates or prisms as already described. Yield,--3 g. The sodium salt of the above acid, prepared by neutral izing the acid in solution with sodium hydroxide and evaporating, came down in small soluble white plates containing no water of crystallization. An analysis yielded the following results: Calculated for Found C8H1003NSNa I. II. Na (as sulphate) 10.32% 10.28% 10.36% The barium salt, prepared by the barium carbonate method, came down in readily soluble long prismatic plates containing seven molecules of water of crystallization. These lost a part of their water on long exposure to the air, becoming opaque in appearance. Calculated for Found (C8H1003NS2)Ba 7H20 I. II. H20 19.0%. 19.12% 19.22% Ba (as sulphate) 20.7% 20.48% 20.36% The above described...
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