- Formula: C4H6
- Molecular weight: 54.0904
- IUPAC Standard InChI:
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- IUPAC Standard InChIKey: QNRMTGGDHLBXQZ-UHFFFAOYSA-N
- CAS Registry Number: 590-19-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
- Other names: Allene, methyl-; Methylallene; CH2=C=CHCH3; Buta-1,2-diene
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Gas phase thermochemistry data
Go To: Top, References, Notes
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
|fH°gas||38.77 ± 0.14||kcal/mol||Cm||Prosen, Maron, et al., 1951||ALS|
|fH°gas||39.53 ± 0.28||kcal/mol||Ccb||Prosen, Maron, et al., 1949||ALS|
|cH°gas||-619.93 ± 0.13||kcal/mol||Cm||Prosen, Maron, et al., 1951||Corresponding «DELTA»fHºgas = 38.78 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS|
|cH°gas||-620.69 ± 0.28||kcal/mol||Ccb||Prosen, Maron, et al., 1949||Corresponding «DELTA»fHºgas = 39.54 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS|
Constant pressure heat capacity of gas
|Cp,gas (cal/mol*K)||Temperature (K)||Reference||Comment|
|8.564||50.||Thermodynamics Research Center, 1997||Recommended values are in close agreement with those obtained from earlier statistical thermodynamics calculation [ Kilpatrick J.E., 1949].; GT|
Go To: Top, Gas phase thermochemistry data, Notes
Prosen, Maron, et al., 1951
Prosen, E.J.; Maron, F.W.; Rossini, F.D., Heats of combustion, formation, and insomerization of ten C4 hydrocarbons, J. Res. NBS, 1951, 46, 106-112. [all data]
Prosen, Maron, et al., 1949
Prosen, E.J.; Maron, F.W.; Rossini, F.D., Heat of isomerization of the two butadienes, J. Res. NBS, 1949, 42, 269-275. [all data]
Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]
Kilpatrick J.E., 1949
Kilpatrick J.E., Heats, equilibrium constants, and free energies of formation of the C3 to C5 diolefins, styrene, and the methylstyrenes, J. Res. Nat. Bur. Stand., 1949, 42, 225-240. [all data]
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas cH°gas Enthalpy of combustion of gas at standard conditions fH°gas Enthalpy of formation of gas at standard conditions
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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