Ethyltolunedescribesorganic compoundswith the formulaCH3C6H4CH2CH3.Three isomers exist: 1,2- 1,3-, and 1,4-. All are colorless liquids, immiscible in water, with similarboiling points.They are classified arearomatichydrocarbons.The ring bears two substituents: amethyl groupand anethyl group.[1]
| Cymenes | |||
| Name | 2-ethyltoluene | 3-ethyltoluene | 4-Ethyltoluene |
|---|---|---|---|
| Structural formula |  |
 |
|
| CAS number | 611-14-3 | 620-14-4 | 622-96-8 |
| melting point | -80.8 | -95.5 | -62.3 |
| boiling point(°C) | 165 | 161.3 | 162 |
Production and reactions
editEthyltoluenes are prepared byalkylationoftoluenewithethylene:
- CH3C6H5+ CH2=CH2→ CH3C6H4CH2CH3
These alkylations are catalyzed by variousLewis acids,such asaluminium trichloride.
3- and 4-Ethyltoluenes are mainly of interest as precursors tomethylstyrenes:
- CH3C6H4CH2CH3→ CH3C6H4CH=CH2+ H2
This dehydrogenation is conducted in the presence ofzinc oxidecatalysts.[1]
References
edit- ^abSchmidt, Roland; Griesbaum, Karl; Behr, Arno; Biedenkapp, Dieter; Voges, Heinz-Werner; Garbe, Dorothea; Paetz, Christian; Collin, Gerd; Mayer, Dieter; Höke, Hartmut (2014). "Hydrocarbons".Ullmann's Encyclopedia of Industrial Chemistry.pp. 1–74.doi:10.1002/14356007.a13_227.pub3.ISBN9783527306732.
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