3,4,5-Trimethylbenzoic acid
- Formula: C10H12O2
- Molecular weight: 164.2011
- IUPAC Standard InChIKey: OWBVULKHVZHYPN-UHFFFAOYSA-N
- CAS Registry Number: 1076-88-6
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, References, Notes
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°gas | -389.8 ± 1.9 | kJ/mol | Cm | Colomina, Jimenez, et al., 1987 | see Colomina, Turrion, et al., 1964 |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, References, Notes
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°solid | -500.8 ± 1.8 | kJ/mol | Cm | Colomina, Jimenez, et al., 1987 | see Colomina, Turrion, et al., 1964 |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -5149.3 ± 0.92 | kJ/mol | Cm | Colomina, Jimenez, et al., 1987 | see Colomina, Turrion, et al., 1964; Corresponding ΔfHºsolid = -500.8 kJ/mol (simple calculation by NIST; no Washburn corrections) |
Phase change data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, 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
DRB - Donald R. Burgess, Jr.
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔsubH° | 111.0 ± 0.5 | kJ/mol | V | Colomina, Jimenez, et al., 1987 | see Colomina, Turrion, et al., 1964; ALS |
ΔsubH° | 111.0 | kJ/mol | N/A | Colomina, Jimenez, et al., 1987 | DRB |
ΔsubH° | 111.0 ± 0.5 | kJ/mol | ME | Colomina, Jimenez, et al., 1987 | Based on data from 340. to 359. K.; AC |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
109.3 ± 0.5 | 350. | ME | Colomina, Jimenez, et al., 1987 | Based on data from 340. to 359. K.; AC |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: John E. Bartmess
De-protonation reactions
C10H11O2- + =
By formula: C10H11O2- + H+ = C10H12O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1428. ± 9.2 | kJ/mol | G+TS | Decouzon, Exner, et al., 1996 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1398. ± 8.4 | kJ/mol | IMRE | Decouzon, Exner, et al., 1996 | gas phase |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, 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., 1987
Colomina, M.; Jimenez, P.; Roux, M.V.; Turrion, C.,
Thermochemical properties of benzoic acid derivatives. XV. Vapour pressures and enthalpies of sublimation and formation of the six trimethylbenzoic acids,
J. Chem. Thermodyn., 1987, 19, 1139-1144. [all data]
Colomina, Turrion, et al., 1964
Colomina, M.; Turrion, C.; Boned, M.L.; Panea, M.,
Investigaciones termoquimicas sobre los acidos alquilbenzoicos. III. Acidos trimetilbenzoicos,
Anal. Fisc. Quim. B, 1964, 60, 619-626. [all data]
Decouzon, Exner, et al., 1996
Decouzon, M.; Exner, O.; Gal, J.-F.; Maria, P.-C.,
Non-classical Buttressing Effect: Gas-phase Ionization of Some Methyl Substituted Benzoic Acids,
J. Chem. Soc. Perkin Trans., 1996, 2, 4, 475, https://doi.org/10.1039/p29960000475
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, References
- Symbols used in this document:
ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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