This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...in coal-tar by Hofmann in 1845. It is obtained from the portion of coal-tar which boils at 80-85 by fractionating or freezing. It may be prepared chemically pure by distilling a mixture of benzoic acid and lime. The ordinary benzene of commerce usually contains thiophene, and thus gives a ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...in coal-tar by Hofmann in 1845. It is obtained from the portion of coal-tar which boils at 80-85 by fractionating or freezing. It may be prepared chemically pure by distilling a mixture of benzoic acid and lime. The ordinary benzene of commerce usually contains thiophene, and thus gives a characteristic deep-blue coloration when shaken with a solution of isatin in concentrated sulphuric acid; but it may be freed from the impurity by repeated shaking with small quantities of sulphuric acid, which converts the thiophene into a sulphonic acid. It burns with a luminous smoky flame, and is a good solvent for resins, fats, iodine, sulphur, phosphorus, &c. When its vapour is led through a red-hot tube, diphenyl is obtained. CyHg.--Toluene, C6H5 CH. Discovered in 1837. Formation: by the dry distillation of balsam of Tolu and of many resins. Synthesis according to Fittig (see above). Preparation: from coal-tar, in which it is found accompanied by thio-tolene. Toluene is very similar to benzene, it boils at 110, and is still liquid at--28. Cr02Cl2 converts it into benzaldehyde, and HN03 or Cr08 into benzoic acid. C8H, n.--(a) o-, m-, and-Dimethyl-benzenes or XyleneB, C0H4(CH8)2.--The xylene of coal-tar consists of a mixture of the three isomers, m-xylene being present to the extent of 70 to 85 per cent. These cannot be separated from one another by fractional distillation. TO-Xylene is more slowly oxidized by dilute nitric acid than its isomers, and can thus be obtained with relative ease. For the separation of these isomers by means of HJ30, see B. 10, 1010; 14, 2625; 17, 444; 25, Rf. 315; and for their recognition see B. 19, 2513. Benzene and toluene yield chiefly ortho-, together with a little para-xylene, when subjected to the...
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Add this copy of A Textbook of Organic Chemistry to cart. $13.92, fair condition, Sold by Victoria Bookshop rated 3.0 out of 5 stars, ships from Bere Alston, DEVON, UNITED KINGDOM, published 1936 by Blackie 1936.
Add this copy of A Textbook of Organic Chemistry to cart. $20.00, good condition, Sold by Bob Jent rated 5.0 out of 5 stars, ships from Tucson, AZ, UNITED STATES, published 1930 by D Van Nostrand Co.
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NO EXPEDITED SHIPPING. good, owner sig, some writing on F end papers, age spots. Cover good, light wear, corner bumps, no dj. No expedited shipping. AS-IS No return or refund.
Add this copy of A Textbook of Organic Chemistry to cart. $21.54, good condition, Sold by captnbook rated 4.0 out of 5 stars, ships from Spokane, WA, UNITED STATES, published 1912 by D. Van Nostrand Company.
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Add this copy of A Textbook of Organic Chemistry to cart. $31.68, good condition, Sold by Anybook rated 4.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1931 by Blackie and Son.
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This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In good all round condition. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 1100grams, ISBN:
Add this copy of A textbook of organic chemistry to cart. $38.23, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2020 by Alpha Edition.
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