界面活性剤の合成研究-8-

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The surface activity of the α-substituted higher aliphatic acids was studied. These compounds were prepared by reaction of α-bromo-fatty acid with various compounds, such as sodium hydroxide, N-methyltaurine, monoethanolamine, diethanolamine, glycine, <I>n</I>-butylamine, ethylenediamine, potassium cyanide (The obtained α-cyano-fatty acid was hydrolyzed into dicarboxylic acid.), ammonia, trimethylamine and thiourea (The obtained pseudothiohydantoin was decomposed into α-mercapto-fatty acid.).<BR>These reaction products were surface active and some of them were stable for metallic ion.<BR>It was proved by IR spectrum that α-trimethyl ammonium bromide-stearic acid was decarboxylated by heating into heptadecyl trimethyl ammonium bromide. It was found that the decarboxylation reaction was first order and the activation energy was about 32.9 kcal/mol.
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