2H-Pyran-2-one, tetrahydro-

• Formula: C₅H₈O₂
• Molecular weight: 100.1158
• IUPAC Standard InChI: InChI=1S/C5H8O2/c6-5-3-1-2-4-7-5/h1-4H2 Copy

  
• IUPAC Standard InChIKey: OZJPLYNZGCXSJM-UHFFFAOYSA-N Copy
• CAS Registry Number: 542-28-9
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: δ-Valerolactone; δ-Valeryllactone; Pentanoic acid, 5-hydroxy-, δ-lactone; Tetrahydro-2-pyranone; 5-Valerolactone; Valeric acid, δ-hydroxy-, δ-lactone; 5-Hydroxypentanoic acid δ-lactone; 1-Oxacyclohexan-2-one; Tetrahydro-2H-pyran-2-one; Delta-valerolactone; δ-Pentalactone; 5-Pentanolide; Cyclopentanolide; Tetrahydropyran-2-one; NSC 6247; Pentan-5-olide; γ-Valerolactone
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• Information on this page:
  • Condensed phase thermochemistry data
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Phase change data
  • IR Spectrum
  • Gas Chromatography
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Condensed phase thermochemistry 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Mass spectrum (electron ionization)

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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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

References

Go To: Top, Condensed phase thermochemistry data, Mass spectrum (electron ionization), Notes

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

Wiberg and Waldron, 1991
Wiberg, K.B.; Waldron, R.F., Lactones. 2. Enthalpies of hydrolysis, reduction, and formation of the C₄-C₁₃ monocyclic lactones. strain energies and conformations, J. Am. Chem. Soc., 1991, 113, 7697-7705. [all data]

Leitao, Pilcher, et al., 1990
Leitao, M.L.P.; Pilcher, H.; Meng-Yan, Y.; Brown, J.M.; Conn, A.D., Enthalpies of combustion of γ-butyrolactone, γ-valerolactone, and δ-valerolactone, J. Chem. Thermodyn., 1990, 22, 885-891. [all data]

Brown, Conn, et al., 1989
Brown, J.M.; Conn, A.D.; Pilcher, G.; Leitao, M.L.P.; Yang, M.-Y., On the strain energy of 5-ring and 6-ring lactones, J. Chem. Soc., Chem. Commun., 1989, 1817-1819. [all data]

Lebedev and Yevstropov, 1983
Lebedev, B.V.; Yevstropov, A.A., Thermodynamics of β-propiolactone, t-butyrolactone, d-valerolactone, and e-caprolactone from 13.8 to 340 K, J. Chem. Thermodynam., 1983, 15, 115-128. [all data]

Yevstropov, Lebedev, et al., 1982
Yevstropov, A.A.; Lebedev, B.V.; Kulagina, T.G.; Lebedev, N.K., Calorimetric study of d-valerolactone, poly-d-valerolactone and of the process of polymerization of d-valerolactone in the 13.8 to 340 K temperature range, Vysokomol. Soedin., Ser. A, 1982, 24, 568-574. [all data]

Evstopov, Lebedev, et al., 1981
Evstopov, A.A.; Lebedev, B.V.; Kulagina, T.G.; Lebedev, N.K., Thermodynamics of the polymerization process of d-valerolactone and poly-d-valerolactone in the range 0 to 350 K, Termodin. Org. Soedin., 1981, 20-31. [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  S°liquid	Entropy of liquid at standard conditions
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions

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