Pinene

Pinene is a collection of unsaturated bicyclic monoterpenes. Two geometric isomers of pinene are found in nature, α-pinene and β-pinene. Both are chiral. As the name suggests, pinenes are found in pines. Specifically, pinene is the major component of the liquid extracts of conifers. Pinenes are also found in many non-coniferous plants such as camphorweed (Heterotheca) and big sagebrush (Artemisia tridentata).

Pinene
Names
IUPAC names
(1S,5S)-2,6,6-trimethylbicyclo[3.1.1]hept-2-ene
(1S,5S)-6,6-dimethyl-2-methylenebicyclo[3.1.1]heptane
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.170
EC Number
  • (1R-α): 232-087-8
UNII
  • (mixture): CC1=CCC2CC1C2(C)C
Properties
C10H16
Molar mass 136.24 g/mol
Appearance Liquid
Density 0,86 g·cm−3 (alpha, 15 °C)
Melting point −62 to −55 °C (−80 to −67 °F; 211 to 218 K) (alpha)
Boiling point 155 to 156 °C (311 to 313 °F; 428 to 429 K) (alpha)
Practically insoluble in water
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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