4-Ethyltoluene
{{Chembox
| ImageFile = P-Ethyltoluene.svg
| ImageSize = 150
| ImageAlt =
| PIN = 1-Ethyl-4-methylbenzene
| OtherNames = p-Ethylmethylbenzene, p-Ethyltoluene
|Section1={{Chembox Identifiers
| CASNo = 622-96-8
| CASNo_Ref = {{cascite|correct|CAS}}
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = G6JY83VLB5
| PubChem = 12160
| ChemSpiderID = 11660
| SMILES = CCc1ccc(cc1)C
| StdInChI = 1S/C9H12/c1-3-9-6-4-8(2)5-7-9/h4-7H,3H2,1-2H3
| StdInChIKey = JRLPEMVDPFPYPJ-UHFFFAOYSA-N}}
|Section2={{Chembox Properties
| C=9|H=12
| Appearance = colorless liquid
| Density = 0.861 g/cm3
| MeltingPtC =
| BoilingPtC = 162
| Solubility = }}
|Section3={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt = }}
}}
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.
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.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}}
4-Ethyltoluene is subjected dehydrogenation to give 4-vinyltoluene.{{citation | author=Denis H. James | author2=William M. Castor | contribution=Styrene | title=Ullmann's Encyclopedia of Industrial Chemistry | edition=7th | publisher=Wiley | year=2007 | page=1|doi=10.1002/14356007.a25_329.pub2}}
References
{{Reflist}}
{{DEFAULTSORT:Ethyltoluene, 4-}}
{{Hydrocarbons}}