Phellandrene
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| Phellandrenes | |
|---|---|
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| IUPAC name | α: 2-methyl-5-(1-methylethyl)- 1,3-cyclohexadiene β: 3-methylene-6-(1- methylethyl)cyclohexene |
| Identifiers | |
| CAS number | α: [99-83-2] β: [555-10-2] |
| SMILES | α: CC(C)C1CC=C(C)C=C1 β: CC(C)C1CCC(=C)C=C1 |
| Properties | |
| Molecular formula | C10H16 |
| Molar mass | 136.24 g/mol |
| Density | α: 0.846 g/cm3 β: 0.85 g/cm3 |
| Melting point |
α: 125-126°C |
| Boiling point |
α: 171-172 °C |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Phellandrene is the name for a pair of organic compounds that have a similar molecular structure and similar chemical properties. α-Phellandrene and β-phellandrene are cyclic monoterpenes and are double bond isomers. In α-phellandrene both double bonds are endocyclic and in β-phellandrene one of them is exocyclic. Both are insoluble in water, but miscible with ether.
α-Phellandrene is a constituent of the essential oils of Eucalyptus dives and of Eucalyptus phellandra (hence the name). β-Phellandrene has been isolated from the oil of water fennel and Canada balsam oil.
The phellandrenes are used in fragrances because of their pleasing aromas. The odor of β-phellandrene has been described as peppery-minty and slightly citrusy.
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