2H-Pyran, 3,4-dihydro-
- Formula: C5H8O
- Molecular weight: 84.1164
- IUPAC Standard InChIKey: BUDQDWGNQVEFAC-UHFFFAOYSA-N
- CAS Registry Number: 110-87-2
- 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:
- Other names: Dihydropyran; 2,3-Dihydro-4H-pyran; 2H-3,4-Dihydropyran; 3,4-Dihydro-2H-pyran; 3,4-Dihydropyran; 5,6-Dihydro-4H-pyran; 2,3-Dihydropyran; 3,4-Dihdro-2H-pyrane; 3,4-Dihydro-2-pyran; δ2-Dihydropyran; Pyran, dihydro-; 1,2-Pyran, 3,4-dihydro-; NSC 57860
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Gas 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -112.81 ± 0.90 | kJ/mol | Ccr | Steele, Chirico, et al., 1989 | ALS |
Constant pressure heat capacity of gas
Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
34.78 | 50. | Dorofeeva O.V., 1992 | p=1 bar.; GT |
42.08 | 100. | ||
51.39 | 150. | ||
62.90 | 200. | ||
84.11 | 273.15 | ||
92.2 ± 3.5 | 298.15 | ||
92.76 | 300. | ||
125.37 | 400. | ||
154.64 | 500. | ||
179.15 | 600. | ||
199.47 | 700. | ||
216.44 | 800. | ||
230.73 | 900. | ||
242.86 | 1000. | ||
253.19 | 1100. | ||
262.02 | 1200. | ||
269.61 | 1300. | ||
276.14 | 1400. | ||
281.79 | 1500. |
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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | -147.73 ± 0.86 | kJ/mol | Ccr | Steele, Chirico, et al., 1989 | |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -2963.14 ± 0.80 | kJ/mol | Ccr | Steele, Chirico, et al., 1989 | Corresponding ΔfHºliquid = -147.73 kJ/mol (simple calculation by NIST; no Washburn corrections) |
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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 359.7 | K | N/A | Weast and Grasselli, 1989 | BS |
Tboil | 359. | K | N/A | Moshkin, 1955 | Uncertainty assigned by TRC = 4. K; TRC |
Tboil | 359. | K | N/A | Schniepp and Geller, 1946 | Uncertainty assigned by TRC = 2. K; TRC |
Tboil | 358.85 | K | N/A | Anonymous, 1942 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 561.7 | K | N/A | Kobe and Mathews, 1970 | Uncertainty assigned by TRC = 0.83 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 45.60 | bar | N/A | Kobe and Mathews, 1970 | Uncertainty assigned by TRC = 0.5066 bar; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 34.92 ± 0.04 | kJ/mol | V | Steele, Chirico, et al., 1989 | ALS |
ΔvapH° | 34.9 | kJ/mol | N/A | Steele, Chirico, et al., 1989 | DRB |
Reaction 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
By formula: C5H8O + H2 = C5H10O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -103.3 ± 1.0 | kJ/mol | Chyd | Allinger, Glaser, et al., 1981 | liquid phase; solvent: Hexane |
IR Spectrum
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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
Gas Phase Spectrum
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Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.
Additional Data
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Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | NIST Mass Spectrometry Data Center |
State | gas |
Instrument | HP-GC/MS/IRD |
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
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | NIST Mass Spectrometry Data Center, 1990. |
NIST MS number | 113097 |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, 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.
Steele, Chirico, et al., 1989
Steele, W.V.; Chirico, R.D.; Nguyen, A.; Hossenlopp, I.A.; Smith, N.K.,
Determination of some pure compound ideal-gas enthalpies of formation,
AIChE Symp. Ser., 1989, 85, 140-162. [all data]
Dorofeeva O.V., 1992
Dorofeeva O.V.,
Ideal gas thermodynamic properties of oxygen heterocyclic compounds. Part 2. Six-membered, seven-membered and eight-membered rings,
Thermochim. Acta, 1992, 200, 121-150. [all data]
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]
Moshkin, 1955
Moshkin, P.A.,
Vpr. Isolz. Pentozansoderzh. Syrya Tr. Vses. Soveshch. Riga, 1955, 1955, 225 (1958). [all data]
Schniepp and Geller, 1946
Schniepp, L.E.; Geller, H.H.,
Preparation of Dihydropyran. δ-Hydroxyvaleraldehyde and 1,5-Pentanediol from Tetrahydrofurfuryl Alcohol,
J. Am. Chem. Soc., 1946, 68, 1646-8. [all data]
Anonymous, 1942
Anonymous, R.,
, Am. Pet. Inst. Res. Proj. 6, Natl. Bur. Stand., 1942. [all data]
Kobe and Mathews, 1970
Kobe, K.A.; Mathews, J.F.,
Critical Properties and Vapor Pressures of Some Organic Nitrogen and Oxygen Compounds,
J. Chem. Eng. Data, 1970, 15, 182. [all data]
Allinger, Glaser, et al., 1981
Allinger, N.L.; Glaser, J.A.; Davis, H.E.,
Heats of hydrogenation of some vinyl ethers and related compounds,
J. Org. Chem., 1981, 46, 658-661. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Pc Critical pressure Tboil Boiling point Tc Critical temperature ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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