2,3,5,6-Tetramethylbenzoic acid
- Formula: C11H14O2
- Molecular weight: 178.2277
- IUPAC Standard InChIKey: STIDRZRESMTQBD-UHFFFAOYSA-N
- CAS Registry Number: 2604-45-7
- 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: Benzoic acid, 2,3,5,6-tetramethyl-
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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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°solid | -506.2 ± 2.0 | kJ/mol | Cm | Colomina, Jimenez, et al., 1988 | see Colomina, Perez-Ossorio, et al., 1964; see 60COL/PER; ALS |
ΔfH°solid | -506.1 ± 1.0 | kJ/mol | Ccb | Colomina, Perez-Ossorio, et al., 1960 | crystal phase; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -5823.5 ± 1.0 | kJ/mol | Ccb | Colomina, Perez-Ossorio, et al., 1960 | crystal phase; Corresponding ΔfHºsolid = -505.97 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
231.7 | 298.15 | Colomina, Jimenez, et al., 1988 | DH |
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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Additional Data
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Owner | SRD/NIST Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | EPA-IR VAPOR PHASE LIBRARY |
State | gas |
References
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Colomina, Jimenez, et al., 1988
Colomina, M.; Jimenez, P.; Perez-Ossorio, R.; Roux, M.V.; Turrion, C.,
Thermochemical properties of benzoic acid derivatives. XVI. Vapour pressures and enthalpies of sublimation and formation of the three tetramethylbenzoic acids and of pentamenthylbenzoic acid,
J. Chem. Thermodyn., 1988, 20, 575-580. [all data]
Colomina, Perez-Ossorio, et al., 1964
Colomina, M.; Perez-Ossorio, R.; Turrion, C.; Boned, M.L.; Pedraja, B.,
Investigaciones termoquimicas sobre los acidos alquilbenzoicos,
Anal. Fisc. Quim. B, 1964, 60, 627-638. [all data]
Colomina, Perez-Ossorio, et al., 1960
Colomina, M.; Perez-Ossorio, R.; Boned, M.L.; Panea, M.; Turrion, C.,
Thermochemical investigations on methylsubstituted benzoic acid, Rpt. for the US. Dept. of the Army, European Research Office contract no. DA-91-591-EUC-1364-OI-4291-60 by Instituto de Quimica Fisica Madrid, Spain, 1960, 1-38. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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