DL-Methionine
- Formula: C5H11NO2S
- Molecular weight: 149.211
- IUPAC Standard InChI: InChI=1S/C5H11NO2S/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)
- IUPAC Standard InChIKey: FFEARJCKVFRZRR-UHFFFAOYSA-N
- CAS Registry Number: 59-51-8
- Chemical structure:
This structure is also available as a 2d Mol file - Species with the same structure:
- Stereoisomers:
- Other names: Racemethionine; DL-2-Amino-4-(methylthio)butanoic acid; DL-CH3SCH2CH2CH(NH2)COOH; α-Amino-γ-methylmercaptobutyric acid; (.+/-.)-Methionine; Acimetion; Banthionine; Cynaron; Dyprin; DL-2-Amino-4-(methylthio)butyric acid; Lobamine; Meonine; Mertionin; Methilanin; Methionine; Methionine, DL-; Metione; Neston; Urimeth; Pedameth; 2-Amino-4-(methylmercapto)butyric acid; Amurex; Methilonin; Methionine dl-form; Metion; Petameth; NSC 9241
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- Other data available:
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Condensed phase thermochemistry data
Go To: Top, 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 by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 231.46 | J/mol*K | N/A | Hutchens, Cole, et al., 1964 |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 290.03 | 298.15 | Hutchens, Cole, et al., 1964 | T = 11 to 348 K. |
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
+
=
By formula: C5H10NO2S- + H+ = C5H11NO2S
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1407. ± 9.2 | kJ/mol | CIDC | Jones, Bernier, et al., 2007 | gas phase |
| ΔrH° | 1405. ± 13. | kJ/mol | G+TS | O'Hair, Bowie, et al., 1992 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1376. ± 13. | kJ/mol | CIDC | O'Hair, Bowie, et al., 1992 | gas phase |
References
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hutchens, Cole, et al., 1964
Hutchens, J.O.; Cole, A.G.; Stout, J.W.,
Heat capacities and entropies of L-cystine and L-methionine. The transition of L-methionine near 305.5 K,
J. Biol. Chem., 1964, 239, 591-595. [all data]
Jones, Bernier, et al., 2007
Jones, C.M.; Bernier, M.; Carson, E.; Colyer, K.E.; Metz, R.; Pawlow, A.; Wischow, E.D.; Webb, I.; Andriole, E.J.; Poutsma, J.C.,
Gas-phase Acities of the 20 Protein Amino Acids,
Int. J. Mass Spectrom., 2007, 267, 1-3, 54-62, https://doi.org/10.1016/j.ijms.2007.02.018
. [all data]
O'Hair, Bowie, et al., 1992
O'Hair, R.J.; Bowie, J.H.; Gronert, S.,
Gas Phase Acidity of the alpha-Amino Acids,
Int. J. Mass Spectrom. Ion Proc., 1992, 117, 23, https://doi.org/10.1016/0168-1176(92)80083-D
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) 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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