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
IUPAC Standard InChIKey: OZJPLYNZGCXSJM-UHFFFAOYSA-N
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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- Gas Phase Kinetics Database
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Gas phase thermochemistry data

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Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-89.9 ± 0.8	kcal/mol	Cm	Wiberg and Waldron, 1991	Heat of reduction
Δ_fH°_gas	-90.7 ± 0.2	kcal/mol	Ccb	Leitao, Pilcher, et al., 1990	See Brown, Conn, et al., 1989

Gas Chromatography

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

Van Den Dool and Kratz RI, non-polar column, temperature ramp

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Column type	Active phase	I	Reference	Comment
Capillary	DB-1	1010.	Osorio, Alarcon, et al., 2006	25. m/0.2 mm/0.33 μm, 4. K/min; T_start: 50. C; T_end: 300. C

Van Den Dool and Kratz RI, non-polar column, custom temperature program

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Column type	Active phase	I	Reference	Comment
Capillary	DB-5	954.	Andrade, Sampaio, et al., 2007	30. m/0.25 mm/0.25 μm, He; Program: 40C(2min) => 4C/min => 220C => 20C/min => 280C

Van Den Dool and Kratz RI, polar column, temperature ramp

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Column type	Active phase	I	Reference	Comment
Capillary	DB-Wax	1780.	Osorio, Alarcon, et al., 2006	30. m/0.25 mm/0.25 μm, He, 50. C @ 4. min, 4. K/min, 220. C @ 20. min
Capillary	DB-Wax	1784.	Fröhlich, Duque, et al., 1989	30. m/0.25 mm/0.25 μm, He, 50. C @ 3. min, 4. K/min; T_end: 250. C
Capillary	DB-Wax	1785.	Fröhlich, Duque, et al., 1989	30. m/0.25 mm/0.25 μm, He, 50. C @ 3. min, 4. K/min; T_end: 250. C

Normal alkane RI, non-polar column, temperature ramp

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Column type	Active phase	I	Reference	Comment
Capillary	VF-5 MS	961.	Leffingwell and Alford, 2011	60. m/0.32 mm/0.25 μm, Helium, 2. K/min, 260. C @ 28. min; T_start: 30. C
Capillary	VF-5 MS	965.	Leffingwell and Alford, 2011	60. m/0.32 mm/0.25 μm, Helium, 2. K/min, 260. C @ 28. min; T_start: 30. C

Normal alkane RI, non-polar column, custom temperature program

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Column type	Active phase	I	Reference	Comment
Capillary	DB-1	991.	Ciccioli, Cecinato, et al., 1994	60. m/0.32 mm/0.25 μm; Program: not specified
Capillary	DB-1	991.	Ciccioli, Brancaleoni, et al., 1993	60. m/0.32 mm/0.25 μm; Program: 3 min at 5 C; 5 - 50 C at 3 deg/min; 50 - 220 C at 5 deg/min

Normal alkane RI, polar column, custom temperature program

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Column type	Active phase	I	Reference	Comment
Capillary	Stabilwax	1786.	Chinnici, Guerrero, et al., 2009	30. m/0.25 mm/0.25 μm, Helium; Program: 35 0C 3 0C/min -> 100 0C 5 0C/min -> 240 0C (10 min)
Capillary	Carbowax 20M	1730.	Vinogradov, 2004	Program: not specified

References

Go To: Top, Gas phase thermochemistry data, Gas Chromatography, Notes

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]

Osorio, Alarcon, et al., 2006
Osorio, C.; Alarcon, M.; Moreno, C.; Bonilla, A.; Barrios, J.; Garzon, C.; Duque, C., Characterization of Odor-Active Volatiles in Champa ( Campomanesia lineatifolia R. P.), J. Agric. Food Chem., 2006, 54, 2, 509-516, https://doi.org/10.1021/jf052098c . [all data]

Andrade, Sampaio, et al., 2007
Andrade, M.S.; Sampaio, T.S.; Nogueira, P.C.L.; Ribeiro, A.S.; Bittrich, V.; Amaral, M.C.E., Volatile compounds of the leaves, flowers and fruits of Kielmeyera rugosa Choisy (Clusiaceae), Flavour Fragr. J., 2007, 22, 1, 49-52, https://doi.org/10.1002/ffj.1751 . [all data]

Fröhlich, Duque, et al., 1989
Fröhlich, O.; Duque, C.; Schreier, P., Volatile constituents of curuba (Passiflora mollissima) fruit, J. Agric. Food Chem., 1989, 37, 2, 421-425, https://doi.org/10.1021/jf00086a033 . [all data]

Leffingwell and Alford, 2011
Leffingwell, J.; Alford, E.D., Volatile constituents of the giant pufball mushroom (Calvatia gigantea), Leffingwell Rep., 2011, 4, 1-17. [all data]

Ciccioli, Cecinato, et al., 1994
Ciccioli, P.; Cecinato, A.; Brancaleoni, E.; Brachetti, A.; Frattoni, M.; Sparapani, R., Composition and Distribution of Polar and Non-Polar VOCs in Urban, Rural, Forest and Remote Areas, Eur Commission EUR, 1994, 549-568. [all data]

Ciccioli, Brancaleoni, et al., 1993
Ciccioli, P.; Brancaleoni, E.; Cecinato, A.; Sparapani, R.; Frattoni, M., Identification and determination of biogenic and anthropogenic volatile organic compounds in forest areas of Northern and Southern Europe and a remote site of the Himalaya region by high-resolution gas chromatography-mass spectrometry, J. Chromatogr., 1993, 643, 1-2, 55-69, https://doi.org/10.1016/0021-9673(93)80541-F . [all data]

Chinnici, Guerrero, et al., 2009
Chinnici, F.; Guerrero, E.D.; Sonni, F.; Natali, N.; Marin, R.N.; Riponi, C., Gas chromatography - mass spectrometry (GC-MS) characterization of volatile compounds in quality vinegars with protected Europian geographical indication, J. Agric. Food Chem., 2009, 57, 11, 4784-4792, https://doi.org/10.1021/jf804005w . [all data]

Vinogradov, 2004
Vinogradov, B.A., Production, composition, properties and application of essential oils, 2004, retrieved from http://viness.narod.ru. [all data]

Notes

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Symbols used in this document:

Δ_fH°_gas Enthalpy of formation of gas at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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