|Molecular mass||134.21 g/mol|
|Melting point||-68 °C|
|Boiling point||177 °C|
|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.
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.
- Bennett, M. A.; Huang, T. N.; Matheson, T. W. and Smith, A. K., "(h6-Hexamethylbenzene)ruthenium complexes", Inorganic Syntheses, 1982, 21, 74-8.