mesitylene oor Portugees
mesitylene
en
(organic chemistry) The aromatic hydrocarbon 1,3,5-trimethylbenzene that is present in coal tar and crude oil; it has some use as a solvent
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Mesitileno
en
chemical compound
pt
composto químico
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Mesitylene is mainly used as a precursor to 2,4,6-trimethylaniline, a precursor to colorants.
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This derivative is prepared by selective mononitration of mesitylene, avoiding oxidation of the methyl groups.
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Anhydrous aluminium chloride is a most powerful Lewis acid, capable of forming Lewis acid-base adducts with even weak Lewis bases such as benzophenone and mesitylene.
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Mesitylene is used in the laboratory as a specialty solvent.
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Oxidation of mesitylene with nitric acid affords trimesic acid, C6H3(COOH)3.
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In 1866 Adolf von Baeyer showed that mesitylene's structure was consistent with that of 1,3,5-trimethylbenzene; however, conclusive proof that mesitylene was identical to 1,3,5-trimethylbenzene was provided by Albert Ladenburg in 1874.
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Mesitylene (Trimethylbenzenes)
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For this reason, mesitylene is sometimes used as an internal standard in NMR samples that contain aromatic protons.
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Mesitylene was first prepared in 1837 by Robert Kane, an Irish chemist, by heating acetone with concentrated sulfuric acid.
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He named his new substance "mesitylene" because the German chemist Carl Reichenbach had named acetone "mesit" (from the Greek μεσίτης, the mediator), and Kane believed that his reaction had dehydrated mesit, converting it to an alkene, "mesitylene".
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However, Kane's determination of the chemical composition ("empirical formula") of mesitylene was incorrect.
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Uvitic acid, 5-methylisophthalic acid, is obtained by oxidizing mesitylene or by condensing pyroracemic acid with baryta water.
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In the electronics industry, mesitylene has been used as a developer for photopatternable silicones due to its solvent properties.
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Fittig discovered the pinacol coupling reaction, mesitylene, diacetyl and biphenyl.
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