A Treatise on Chemistry and Chemical Analysis; Organic Chemistry Volume 4

A Treatise on Chemistry and Chemical Analysis; Organic Chemistry Volume 4

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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. 1900 edition. Excerpt: ...COt//and //and Br may be expected to attract one another. By treating this bromo-succinic acid with alkalies, it is possible to remove HBr from it, and if this is done, the acid that remains should be fumaric acid, not maleic acid. This is actually found to be the case, so that the formula given above for fumaric acid is, to some extent, confirmed. 137. As is seen from Table 13 there are three isomeric acids having the formula CtHt(COtH)t; namely, itaconie, citraconie, and mesaconic acid. ftaconic and citraconic acids are formed by the action of heat on citric and aconitic acids; they both are, by dehydration, converted into citraconic anhydride. Citraconic acid is converted into mesaconic acid when it is boiled with dilute nitric acid, or when heated to 100 with concentrated hydrochloric acid. The three acids, itaconic, citraconic, and mesaconic, are unsaturated and can combine with nascent hydrogen, forming pyrotartaric acid: Itaconic acid crystallizes in rhombic octahedrons, dissolves in 17 parts of water at 10, melts at 161, and is resolved by distillation into water and citraconic anhydride. Citraconic acid crystallizes in four-sided prisms which melt at 80. It is much more soluble in water than itaconic acid, and deliquesces on exposure to the air. Its anhydride CtHtOi forms an oily liquid, which readily recombines with water to form the acid. Mcsaconic acid forms shining prisms, which are only sparingly soluble in cold water. It melts at 208 and sublimes without decomposition. The isomerism of citraconic and mesaconic acids is analogous to that of maleic and fumaric acids. D1BAS1C AC1DS FROM HYDROCARBONS CONTAlNlNG A BENZENE NUCLEUS. 138. These acids are obtained, as their class name indicates, from benzene hydrocarbons. Thus, the most...show more

Product details

  • Paperback | 158 pages
  • 189 x 246 x 9mm | 295g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123660766X
  • 9781236607669