2-Propenoic acid, 2-methyl-
- Formula: C4H6O2
- Molecular weight: 86.0892
- IUPAC Standard InChI: InChI=1S/C4H6O2/c1-3(2)4(5)6/h1H2,2H3,(H,5,6)
- IUPAC Standard InChIKey: CERQOIWHTDAKMF-UHFFFAOYSA-N
- CAS Registry Number: 79-41-4
- 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. - Other names: Methacrylic acid; α-Methylacrylic acid; Methylacrylic acid; 2-Methyl-2-propenoic acid; 2-Methylacrylic acid; CH2=C(CH3)COOH; 2-Methylpropenoic acid; Methacrylic acid glacial; α-Methacrylic acid; Acrylic acid, 2-methyl-; Propionic acid, 2-methylene-; Kyselina methakrylova; NSC 7393
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Condensed 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
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -99.14 ± 0.55 | kcal/mol | Ccb | Van-chin-syan, Kochubei, et al., 1996 | ALS |
| ΔfH°liquid | -100.3 ± 0.1 | kcal/mol | Ccb | Lebedeva, Gutner, et al., 1976 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -482.00 ± 0.53 | kcal/mol | Ccb | Van-chin-syan, Kochubei, et al., 1996 | Corresponding ΔfHºliquid = -99.14 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -480.8 ± 0.1 | kcal/mol | Ccb | Lebedeva, Gutner, et al., 1976 | Corresponding ΔfHºliquid = -100.3 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 38.17 | 298.15 | Karabaev, Abduzhaminov, et al., 1985 | T = 287 to 350 K. Equation only. Cp (J/kg*K) = -551.8 + 8.0712 T. Cp data calculated from equation.; DH |
| 38.17 | 298.15 | Karabaev, Saidov, et al., 1985 | T = 90 to 350 K. Cp(c) = 244.98 + 4.92T J/kg*K (95 to 287.5 K); Cp(liq) = -551.47 + 8.07T J/kg*K (287.5 to 350 K). Cp data calculated from equation.; DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Van-chin-syan, Kochubei, et al., 1996
Van-chin-syan, Yu.Ya.; Kochubei, V.V.; Sergeev, V.V.; Raevskii, Yu.A.; Gerasimchuk, S.I.; Kotovich, Kh.Z.,
Thermodynamic properties of some acids and aldehydes of the acrylic series,
Sov. J. Chem. Phys. (Engl. Transl.), 1996, 70, 1789-1794, In original 1932. [all data]
Lebedeva, Gutner, et al., 1976
Lebedeva, N.D.; Gutner, N.M.; Kiseleva, N.N.,
Correlation of the departures from additivity in the enthalpies of formation of ethylene and benzene derivatives with the σp constants,
J. Org. Chem. USSR (Engl. Transl.), 1976, 12, 1594-1597. [all data]
Karabaev, Abduzhaminov, et al., 1985
Karabaev, M.; Abduzhaminov, T.P.; Saidov, A.A.; Igamberdyev, Kh.T.,
Thermophysical properties of liquid methacrylic acid and its simple esters, Izv. Akad. Nauk Uzb. SSR,
Ser. Fiz.-Mat. Nauk, 1985, (4), 71-74. [all data]
Karabaev, Saidov, et al., 1985
Karabaev, M.; Saidov, A.A.; Abduzhaminov, T.P.; Kenisarin, M.M.,
Heat capacity and molecular kinetic processes of condensed phase acrylates and methacrylates, Izv. Akad. Nauk UzSSR,
Ser. Fiz.-Math., 1985, (6), 51-54. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid 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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