Diamine sentence example

diamine
  • It is obtained by the oxidation of orthophenylene diamine with ferric chloride; when a mixture of para-aminodimethylaniline and meta-toluylenediamine is oxidized in the cold, toluylene blue, an indamine, being formed as an intermediate product and passing into the red when boiled; and also by the oxidation of dimethylparaphenylene diamine with metatoluylene diamine.
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  • Thus ortho-phenylene diamine yields the following products: N H N ./`N; Xn NZ In some cases oxidation of condensed benzenoid-heterocyclic nuclei results in the rupture of the heterocyclic ring with the formation of a benzene dicarboxylic acid; but if the aromatic nucleus be weakened by the introduction of an amino group, then it is the benzenoid nucleus which is destroyed and a dicarboxylic acid of the heterocyclic ring system obtained.
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  • It melts at 173° C.; and on reduction with sodium in alcoholic solution yields tetramethylene diamine.
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  • Orthophenylene diamine, C 6 H 4 (NH2)2, crystallizes from water in plates, which melt at 102 -103° C. and boil at 256-258° C. When heated with io% hydrochloric acid to 180° C. it yields pyrocatechin (Jacob Meyer, Ber., 1897, 30, p. 2569).
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  • Metaphenylene diamine crystallizes in rhombic plates which melt at 63° C. and boil at 287° C. It is easily soluble in water and alcohol.
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  • Paraphenylene diamine may be prepared as above, and also by the reduction of amidoazobenzene.
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  • The dichlorimide, C1N: C 6 H 4: NCI, is formed in a similar manner from paraphenylene diamine.
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  • Witt (Ber., 1877, 10, p. 656), is obtained by coupling phenyl diazonium chloride with meta-phenylene diamine.
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  • It forms practically colourless needles which melt at 89.7° C., and boil at 302.8° C. It is used for the preparation of meta-phenylene diamine.
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  • It is an amorphous solid which melts at 54-55° C. On reduction with sodium in alcoholic solution it yields tetraethylene diamine (putrescein) and pyrollidine.
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  • The polymer is produced by the elimination of hydrogen chloride from terephthaloyl chloride and para-phenylene diamine.
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  • When heated with hydriodic acid (specific gravity 1.96) it forms amino-acetic acid, and with tin and hydrochloric acid it yields ethylene diamine.
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  • It melts at 173° C.; and on reduction with sodium in alcoholic solution yields tetramethylene diamine.
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  • Orthophenylene diamine, C 6 H 4 (NH2)2, crystallizes from water in plates, which melt at 102 -103° C. and boil at 256-258° C. When heated with io% hydrochloric acid to 180° C. it yields pyrocatechin (Jacob Meyer, Ber., 1897, 30, p. 2569).
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  • Metaphenylene diamine crystallizes in rhombic plates which melt at 63° C. and boil at 287° C. It is easily soluble in water and alcohol.
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  • It forms practically colourless needles which melt at 89.7° C., and boil at 302.8° C. It is used for the preparation of meta-phenylene diamine.
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  • It is an amorphous solid which melts at 54-55° C. On reduction with sodium in alcoholic solution it yields tetraethylene diamine (putrescein) and pyrollidine.
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