1,2,4,5-Benzenetetracarboxylic acid, tetramethyl ester
- Formula: C14H14O8
- Molecular weight: 310.2562
- IUPAC Standard InChIKey: QVEIFJBUBJUUMB-UHFFFAOYSA-N
- CAS Registry Number: 635-10-9
- 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: Pyromellitic acid tetramethyl ester; Tetramethyl pyromellitate; Tetramethyl 1,2,4,5-benzenetetracarboxylate; Tetramethyl benzene-1,2,4,5-tetracarboxylate
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Gas phase thermochemistry data
Go To: Top, 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 as indicated in comments:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -325.36 | kcal/mol | N/A | Dibrivnyi and Donchak, 1982 | Value computed using ΔfHsolid° value of -1440.3±2.4 kj/mol from Dibrivnyi and Donchak, 1982 and ΔsubH° value of 79.0 kj/mol from Van Chin, Dibrivnyi, et al., 1980.; DRB |
ΔfH°gas | -323.1 ± 3.8 | kcal/mol | Ccb | Van Chin, Dibrivnyi, et al., 1980 | Heat of combustion is not reported; ALS |
ΔfH°gas | -323.42 | kcal/mol | N/A | Colomina, Laynez, et al., 1972 | Value computed using ΔfHsolid° value of -1432.2±1.2 kj/mol from Colomina, Laynez, et al., 1972 and ΔsubH° value of 79.0 kj/mol from Van Chin, Dibrivnyi, et al., 1980.; DRB |
Condensed phase thermochemistry data
Go To: Top, Gas 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°solid | -344.24 ± 0.57 | kcal/mol | Ccb | Dibrivnyi and Donchak, 1982 | see Van-Chin-Syan, Dibrivnyi, et al., 1981 |
ΔfH°solid | -342.02 ± 0.57 | kcal/mol | Ccb | Van Chin, Dibrivnyi, et al., 1980 | Heat of combustion is not reported |
ΔfH°solid | -342.30 ± 0.28 | kcal/mol | Ccb | Colomina, Laynez, et al., 1972 | |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -1450.5 ± 0.57 | kcal/mol | Ccb | Dibrivnyi and Donchak, 1982 | see Van-Chin-Syan, Dibrivnyi, et al., 1981; Corresponding ΔfHºsolid = -344.38 kcal/mol (simple calculation by NIST; no Washburn corrections) |
ΔcH°solid | -1452.58 ± 0.22 | kcal/mol | Ccb | Colomina, Laynez, et al., 1972 | Corresponding ΔfHºsolid = -342.340 kcal/mol (simple calculation by NIST; no Washburn corrections) |
Phase change data
Go To: Top, Gas phase thermochemistry data, Condensed phase 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DRB - Donald R. Burgess, Jr.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tfus | 418.0 | K | N/A | Dozen, Fujishima, et al., 1978 | Uncertainty assigned by TRC = 0.1 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 34.2 ± 0.2 | kcal/mol | N/A | Jimenez, Menendez, et al., 1995 | AC |
ΔsubH° | 18.9 | kcal/mol | N/A | Van Chin, Dibrivnyi, et al., 1980 | DRB |
ΔsubH° | 32.48 ± 0.31 | kcal/mol | N/A | Turrión, 1967 | See also Jimenez, Menendez, et al., 1995.; AC |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
33.6 ± 0.2 | 381. | ME | Jimenez, Menendez, et al., 1995 | Based on data from 371. to 391. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
8.53 | 416.7 | DSC | Acree, 1993 | AC |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Dibrivnyi and Donchak, 1982
Dibrivnyi, V.N.; Donchak, V.A.,
Standard enthalpies of formation of some pyromellitic acid esters, Deposited Document, SPSTL 1014 Khp-D80. Chem. Abst. 97:134437j, 1982, 19-23. [all data]
Van Chin, Dibrivnyi, et al., 1980
Van Chin, S.; Dibrivnyi, N.V.; Donchak, V.A.,
Peroxide bond energy in tetra-tert-butyl peroxypyromellitate,
Vestn. L'vov. Politekhn. In-ta, 1980, 18-21. [all data]
Colomina, Laynez, et al., 1972
Colomina, M.; Laynez, J.L.; Perez-Ossorio, R.; Turrion, C.,
Enthalpies of combustion and formation of six methyl esters of benzene carboxylic acids,
J. Chem. Thermodyn., 1972, 4, 499-506. [all data]
Van-Chin-Syan, Dibrivnyi, et al., 1981
Van-Chin-Syan, Y.; Dibrivnyi, V.N.; Donchak, V.A.; Chuchmarev, S.K.,
Standard enthalpies of combustion and formation of pyromellitic esters,
Russ. J. Phys. Chem. (Engl. Transl.), 1981, 55, 747. [all data]
Dozen, Fujishima, et al., 1978
Dozen, Y.; Fujishima, S.; Shingu, H.,
Structures and fusion parameters of methoxycarbonyl-benzenes and -naphthalenes,
Thermochim. Acta, 1978, 25, 2, 209, https://doi.org/10.1016/0040-6031(78)85008-4
. [all data]
Jimenez, Menendez, et al., 1995
Jimenez, P.; Menendez, V.; Roux, M.V.; Turrion, C.,
Vapour pressures and enthalpies of sublimation of four polymethoxycarbonylbenzenes,
J. Chem. Thermodyn., 1995, 27, 679-683. [all data]
Turrión, 1967
Turrión, C.,
, Presiones de vapor y calores de sublimación de los ácidos bencenecarboxilicos y sus ésteres metilicos. Beca "Juan March" de estudios en España, grupo B, Madrid, 1967. [all data]
Acree, 1993
Acree, William E.,
Thermodynamic properties of organic compounds,
Thermochimica Acta, 1993, 219, 97-104, https://doi.org/10.1016/0040-6031(93)80486-T
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Tfus Fusion (melting) point 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 ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.