2-Butenedioic acid, 2-methyl-, (E)-
- Formula: C5H6O4
- Molecular weight: 130.0987
- IUPAC Standard InChI: InChI=1S/C5H6O4/c1-3(5(8)9)2-4(6)7/h2H,1H3,(H,6,7)(H,8,9)/b3-2+
- IUPAC Standard InChIKey: HNEGQIOMVPPMNR-NSCUHMNNSA-N
- CAS Registry Number: 498-24-8
- 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. - Stereoisomers:
- Other names: Mesaconic acid; trans-1-Propene-1,2-dicarboxylic acid; trans-2-Methyl-2-butenedioic acid; Methylfumaric acid; 2-Methylfumaric acid; (E)-2-Methyl-2-butenedioic acid; Butenedioic acid, methyl-, (E)-; Fumaric acid, methyl-; Mesaconate; Kyselina mesakonova; 2-Butenedioic acid, 2-methyl-, (2E)-; NSC 65438
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Reaction 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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
+
=
By formula: C5H4O3 + H2O = C5H6O4
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -8.13 | kcal/mol | Cm | Conn, Kistiakowsky, et al., 1942 | liquid phase; Heat of hydrolysis at 303 K |
+
=
+
By formula: C5H6O4 + Br2 = C5H6O4 + Br2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -1.2 ± 0.2 | kcal/mol | Eqk | Jwo, Huang, et al., 1987 | solid phase; HPLC |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Conn, Kistiakowsky, et al., 1942
Conn, J.B.; Kistiakowsky, G.B.; Roberts, R.M.; Smith, E.A.,
Heats of organic reactions. XIII. Heats of hydrolysis of some acid anhydrides,
J. Am. Chem. Soc., 1942, 64, 1747-17. [all data]
Jwo, Huang, et al., 1987
Jwo, J-J.; Huang, C-Y.; Chang, E-F.; Wu, R.R.,
Kinetic study of the bromine-catalyzed isomerization of methyl- and chloro-maleic acids in aqueous Ce(IV)-Br- -H2SO4 medium,
J. Chin. Chem. Soc. (Taipei), 1987, 34, 247-256. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
ΔrH° Enthalpy of reaction 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.