Benzoic acid, 3-hydroxy-
- Formula: C7H6O3
- Molecular weight: 138.1207
- IUPAC Standard InChI: InChI=1S/C7H6O3/c8-6-3-1-2-5(4-6)7(9)10/h1-4,8H,(H,9,10)
- IUPAC Standard InChIKey: IJFXRHURBJZNAO-UHFFFAOYSA-N
- CAS Registry Number: 99-06-9
- 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, m-hydroxy-; m-Hydroxybenzoic acid; m-Salicylic acid; 3-Carboxyphenol; 3-Hydroxybenzoic acid; meta-Hydroxybenzoic acid; Acido m-idrossibenzoico; m-Hba; Kyselina 3-hydroxybenzoova; NSC 55746
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Reaction 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -469.1 ± 1.3 | kJ/mol | Ccr | Sabbah and Le, 1993 | ALS |
| ΔfH°gas | -465.5 | kJ/mol | N/A | Colomina, Jimenez, et al., 1980 | Value computed using ΔfHsolid° value of -590.5±1.0 kj/mol from Colomina, Jimenez, et al., 1980 and ΔsubH° value of 125.0 kj/mol from Sabbah and Le, 1993.; DRB |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Reaction 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
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -594.1 ± 1.1 | kJ/mol | Ccr | Sabbah and Le, 1993 | ALS |
| ΔfH°solid | -590.5 ± 1.0 | kJ/mol | Ccb | Colomina, Jimenez, et al., 1980 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -3017.9 ± 1.1 | kJ/mol | Ccr | Sabbah and Le, 1993 | Corresponding ΔfHºsolid = -594.2 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -3021.6 ± 0.4 | kJ/mol | Ccb | Colomina, Jimenez, et al., 1980 | Corresponding ΔfHºsolid = -590.5 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 177.0 | J/mol*K | N/A | Parks and Light, 1934 | Extrapolation below 90 K, 56.48 J/mol*K.; DH |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 157.3 | 288.4 | Parks and Light, 1934 | T = 94 to 288 K. Value is unsmoothed experimental datum.; DH |
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: John E. Bartmess
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
C7H5O3- + =
By formula: C7H5O3- + H+ = C7H6O3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1417. ± 8.8 | kJ/mol | G+TS | Kebarle and McMahon, 1977 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1387. ± 8.4 | kJ/mol | IMRE | Kebarle and McMahon, 1977 | gas phase |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry 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:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
View reactions leading to C7H6O3+ (ion structure unspecified)
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.2 ± 0.2 | EI | Benoit, 1973 | LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| C6H5O+ | 14.4 ± 0.2 | CO+OH | EI | Benoit, 1973 | LLK |
| C7H5O2+ | 12.5 ± 0.2 | OH | EI | Benoit, 1973 | LLK |
De-protonation reactions
C7H5O3- + =
By formula: C7H5O3- + H+ = C7H6O3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1417. ± 8.8 | kJ/mol | G+TS | Kebarle and McMahon, 1977 | gas phase; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1387. ± 8.4 | kJ/mol | IMRE | Kebarle and McMahon, 1977 | gas phase; B |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry 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.
Sabbah and Le, 1993
Sabbah, R.; Le, T.H.D.,
Etude thermodynamique des trois isomeres de l'acide bydroxybenzolque,
Can. J. Chem., 1993, 71, 1378-1383. [all data]
Colomina, Jimenez, et al., 1980
Colomina, M.; Jimenez, P.; Roux, M.V.; Turrion, C.,
Thermochemical properties of o-, m- and p-hydroxybenzoic acids,
J. Calorim. Anal. Therm., 1980, 11, 1-6. [all data]
Parks and Light, 1934
Parks, G.S.; Light, D.W.,
Thermal data on organic compounds. XIII. The heat capacities and entropies of n-tetradecane and the hydroxybenzoic acids. The relative free energies of some benzenoid position isomers,
J. Am. Chem. Soc., 1934, 56, 1511-1513. [all data]
Kebarle and McMahon, 1977
Kebarle, P.; McMahon, T.B.,
Intrinsic Acidities of Substituted Phenols and Benzoic Acids Determined by Gas Phase Proton Transfer Equilibria,
J. Am. Chem. Soc., 1977, 99, 7, 2222, https://doi.org/10.1021/ja00449a032
. [all data]
Benoit, 1973
Benoit, F.,
Substituent effects in mass spectrometry. III. Substituent effects in the dissociation of the molecular ions of para and meta subtituted benzoic acids,
Org. Mass Spectrom., 1973, 7, 295. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) 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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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