Limonene

• Formula: C₁₀H₁₆
• Molecular weight: 136.2340
• IUPAC Standard InChI: InChI=1S/C10H16/c1-8(2)10-6-4-9(3)5-7-10/h4,10H,1,5-7H2,2-3H3 Copy

  
• IUPAC Standard InChIKey: XMGQYMWWDOXHJM-UHFFFAOYSA-N Copy
• CAS Registry Number: 138-86-3
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Species with the same structure:
  • Limonene
• Stereoisomers:
  • D-Limonene
  • Cyclohexene, 1-methyl-4-(1-methylethenyl)-, (S)-
• Other names: Cyclohexene, 1-methyl-4-(1-methylethenyl)-; p-Mentha-1,8-diene; α-Limonene; Cajeputen; Cajeputene; Cinen; Cinene; Dipenten; Dipentene; Eulimen; Kautschin; Limonen; Nesol; p-Mentha-1,8(9)-diene; δ-1,8-Terpodiene; p-Mentha-1,8-diene, dl-; Acintene DP dipentene; Di-p-mentha-1,8-diene; DL-Limonene; Inactive limonene; 1-Methyl-4-isopropenyl-1-cyclohexene; 1,8(9)-p-Menthadiene; 4-Isopropenyl-1-methyl-1-cyclohexene; Acintene DP; Dipanol; UN 2052; Unitene; 4-Isopropenyl-1-methylcyclohexene; 1,8-p-Menthadiene; 1-Methyl-4-(1-methylethenyl)cyclohexene; 1-Methyl-4-isopropenylcyclohexene; (.+/-.)-Limonene; Achilles dipentene; 1-methyl-4-isopropenylcyclohex-1-ene; 1-methyl-4-(prop-1-en-2-yl)cyclohex-1-ene; Cyclohexene, 1-methyl-4-(1-methylethynyl); Cyclohexene, 1-methyl-4-(1-methylethenyl)-, (.+/-.)-; (.+/-.)-Dipentene; (.+/-.)-α-Limonene; Flavor orange; Goldflush II; NSC 21446; Orange flavor; PC 560; D-Limonene; (+)-limonene; (+)-(4R)-limonene; ( R/ S)-limonene; (R)-(+)-Limonene; (R)-Limonene; (±)-limonene; Limonene [4R-(+), 4S-(-)]; δ-Limonene; 1-Limonene; 1-methyl-4-isopropenylcyclohex-1-ene (limonene); (S)-(-)-Limonene; Limonene+; Dipentene limonene
• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Gas phase ion energetics data

Go To: Top, Phase change data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

Appearance energy determinations

References

Go To: Top, Phase change data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Hawkins and Eriksen. W.T., 1954
Hawkins, J.E.; Eriksen. W.T., J. Am. Chem. Soc., 1954, 76, 2669. [all data]

Anonymous, 1942
Anonymous, R., , Am. Pet. Inst. Res. Proj. 6, Natl. Bur. Stand., 1942. [all data]

Hazra, Dollimore, et al., 2002
Hazra, Anasuya; Dollimore, David; Alexander, Kenneth, Thermal analysis of the evaporation of compounds used in aromatherapy using thermogravimetry, Thermochimica Acta, 2002, 392-393, 221-229, https://doi.org/10.1016/S0040-6031(02)00104-1 . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Harris, McKinnon, et al., 1979
Harris, D.; McKinnon, S.; Boyd, R.K., The origins of the base peak in the electron impact spectrum of limonene, Org. Mass Spectrom., 1979, 14, 265. [all data]

Notes

Go To: Top, Phase change data, Gas phase ion energetics data, References

• Symbols used in this document:
  

  AE	Appearance energy
  Tboil	Boiling point
  Tfus	Fusion (melting) point
  ΔvapH	Enthalpy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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