4-Ethyltoluene
4-Ethyltoluene is an organic compound with the formula CH3C6H4C2H5. It is one of three isomers of ethyltoluene, the other two isomers being 3-ethyltoluene and 2-ethyltoluene. All are colorless liquids and all are used for the production of specialty polystyrenes.
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| Names | |
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| IUPAC name
1-Ethyl-4-methylbenzene | |
| Other names
p-Ethylmethylbenzene, p-Ethyltoluene | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.009.784  |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C9H12 | |
| Molar mass | 120.195 g·mol−1 |
| Appearance | colorless liquid |
| Density | 0.861 g/cm3 |
| Boiling point | 162 °C (324 °F; 435 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Production and use
Ethyltoluene is produced by ethylation of toluene:
- CH3C6H5 + C2H4 → CH3C6H4C2H5
Over typical acid catalysts, this process gives a mixture of the 2-, 3-, and 4- isomers. Using a modified zeolite catalyst, the alkylation is shape-selective for the 4- isomer.[1]
4-Ethyltoluene is subjected dehydrogenation to give 4-vinyltoluene.[2]
References
- Karl Griesbaum, Arno Behr, Dieter Biedenkapp, Heinz-Werner Voges, Dorothea Garbe, Christian Paetz, Gerd Collin, Dieter Mayer, Hartmut Höke "Hydrocarbons" in Ullmann's Encyclopedia of Industrial Chemistry 2002 Wiley-VCH, Weinheim. doi:10.1002/14356007.a13_227
- Denis H. James; William M. Castor (2007), "Styrene", Ullmann's Encyclopedia of Industrial Chemistry (7th ed.), Wiley, p. 1, doi:10.1002/14356007.a25_329.pub2
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