Isophthalic acid
- Formula: C8H6O4
- Molecular weight: 166.1308
- IUPAC Standard InChI: InChI=1S/C8H6O4/c9-7(10)5-2-1-3-6(4-5)8(11)12/h1-4H,(H,9,10)(H,11,12)
- IUPAC Standard InChIKey: QQVIHTHCMHWDBS-UHFFFAOYSA-N
- CAS Registry Number: 121-91-5
- 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: 1,3-Benzenedicarboxylic acid; m-Benzenedicarboxylic acid; m-Phthalic acid; Benzene,1,3-dicarboxylic acid; Acide isophtalique; Kyselina isoftalova; IPA; m-Dicarboxybenzene; NSC 15310
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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°solid | -801.5 ± 1.5 | kJ/mol | Ccb | Karyakin, Rabinovich, et al., 1978 | see Karyakin, Rabinovich, et al., 1975 and Karyakin, Kamelova, et al., 1973; ALS |
| ΔfH°solid | -803.04 | kJ/mol | Ccb | Schwabe and Wagner, 1961 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -3204.1 ± 1.5 | kJ/mol | Ccb | Karyakin, Rabinovich, et al., 1978 | see Karyakin, Rabinovich, et al., 1975 and Karyakin, Kamelova, et al., 1973; Corresponding ΔfHºsolid = -801.5 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -3202.6 ± 0.50 | kJ/mol | Ccb | Schwabe and Wagner, 1961 | Corresponding ΔfHºsolid = -802.95 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -3217.85 | kJ/mol | Ccb | Verkade, Coops, et al., 1928 | Corresponding ΔfHºsolid = -787.72 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -3215.37 | kJ/mol | Ccb | Verkade, 1926 | Corresponding ΔfHºsolid = -790.20 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 |
|---|---|---|---|
| 201.7 | 323. | Satoh and Sogabe, 1941 | T = 0 to 100 C. Mean value.; DH |
| 201.7 | 323. | Satoh and Sogabe, 1939 | T = 0 to 100 C. Mean value.; 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.
Karyakin, Rabinovich, et al., 1978
Karyakin, N.V.; Rabinovich, I.B.; Sokolov, L.B.,
Thermodynamics of the synthesis of isomeric poly(phenylenephthalamides),
Vysokomol. Soedin. Ser. B, 1978, 20, 662-666. [all data]
Karyakin, Rabinovich, et al., 1975
Karyakin, N.V.; Rabinovich, I.B.; Kamelova, G.P.; Mochalov, A.N.; Tseitlin, G.M.; Kulagin, V.N.; Korshak, V.V.,
Thermodynamics of the synthesis of poly-2,2'-(m-phenylene)-5-5'-dibenzoxazolomethane,
Polym. Sci. USSR, 1975, 17, 1127-1133. [all data]
Karyakin, Kamelova, et al., 1973
Karyakin, N.V.; Kamelova, G.P.; Yurchenko, V.N.; Kiparisova, e.G.; Korshak, V.V.; Tseitlin, G.M.; Kulagin, V.N.; Rabinovich, I.B.,
Thermodynamics of the synthesis of poly[2,2'-(m-phenylene)-5,5'-dibenzoxazolemethane] from 3,3'-diamino-4,4'-dihydroxydiphenylmethane and isophthalic acid,
Tr. Khim. Khim. Tekhnol., 1973, 71-72. [all data]
Schwabe and Wagner, 1961
Schwabe, K.; Wagner, W.,
Verbrennungs- und bildungswarmen der drei isomeren phthalsauren,
Z. Electrochem., 1961, 65, 812-815. [all data]
Verkade, Coops, et al., 1928
Verkade, P.E.; Coops, J., Jr.; Maan, Chr.J.,
Calorimetrische Untersuchungen. XV. Thermochemische studien uber cycloparaffine und ihre derivate: 1. Experimentelle daten fur funf- und sechsgliedrige cyclische diole,
Ann., 1928, 467, 217-239. [all data]
Verkade, 1926
Verkade, P.E.,
Verbrandingswarmten van plaatsings-isomere benzol-derivaten en de theorie der geinduceerde alterneeren de polatiteit,
Verslag Akad. Wetenschappen Amsterdam, 1926, 35, 492-504. [all data]
Satoh and Sogabe, 1941
Satoh, S.; Sogabe, T.,
The heat capacities of some organic compounds containing nitrogen and the atomic heat of nitrogen. (4), Sci.,
Pap. Inst. Phys. Chem. Res. (Tokyo), 1941, 38, 246-251. [all data]
Satoh and Sogabe, 1939
Satoh, S.; Sogabe, T.,
The specific heats of some solid aromatic acids and their ammonium salts and the atomic heat of nitrogen,
Sci. Pap. Inst. Phys. Chem. Res. (Tokyo), 1939, 36, 449-457. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, 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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