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Cymene
| Cymene |
|
| IUPAC name |
1-methyl-4-(1-methylethyl)benzene |
| Other names |
4-isopropyltoluene |
| Identifiers |
| CAS number |
99-87-6 |
| SMILES |
CC(C)c1ccc(C)cc1 |
| Properties |
| Molecular formula |
C10H14 |
| Molar mass |
134.21 g/mol |
| Density |
0.857 g/cm3 |
| Melting point |
-68 °C
|
| Boiling point |
177 °C
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Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references |
Cymene, or p-cymene, is a naturally occurring aromatic organic compound. It is classified as a hydrocarbon related to a monoterpene. Its structure consists of a benzene ring para-substituted with a methyl group and an isopropyl group. It is insoluble in water, but miscible with ethanol and ether.
Cymene is a constituent of a number of essential oils, most commonly the oil of cumin and thyme.
There are two less common geometric isomers. o-Cymene, in which the alkyl groups are ortho-substituted, and m-cymene, in which they are meta-substituted. p-Cymene is the only natural isomer.
Cymene is a common ligand for ruthenium. The parent compound is [(η6-cymene)MCl2]2. This half-sandwich compound is prepared by the reaction of ruthenium trichloride with the terpene α-phellandrene. The osmium complex is also known.[1]
References
- ^ Bennett, M. A.; Huang, T. N.; Matheson, T. W. and Smith, A. K. (1982). "(h6-Hexamethylbenzene)ruthenium complexes". Inorganic Syntheses 21: 74-8.
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cymene". A list of authors is available in Wikipedia.
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