Creatine
- Formula: C4H9N3O2
- Molecular weight: 131.1332
- IUPAC Standard InChI: InChI=1S/C4H9N3O2/c1-7(4(5)6)2-3(8)9/h2H2,1H3,(H3,5,6)(H,8,9)
- IUPAC Standard InChIKey: CVSVTCORWBXHQV-UHFFFAOYSA-N
- CAS Registry Number: 57-00-1
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Glycine, N-(aminoiminomethyl)-N-methyl-; (α-Methylguanido)acetic acid; Creatin; Kreatin; N-Methyl-N-guanylglycine; N-(Aminoiminomethyl)-N-methyl-glycine; Krebiozon; Methylguanidoacetic acid; NSC 8752; 6020-87-7 (hydrate); N-amidinosarcosine
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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 | -537.18 ± 0.88 | kJ/mol | Ccb | Huffman, Ellis, et al., 1936 | Reanalyzed by Cox and Pilcher, 1970, Original value = -541.03 kJ/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -2323.1 ± 0.84 | kJ/mol | Ccb | Huffman, Ellis, et al., 1936 | Reanalyzed by Cox and Pilcher, 1970, Original value = -2322.4 ± 0.84 kJ/mol; ALS |
| ΔcH°solid | -2325.5 | kJ/mol | Ccb | Emery and Benedict, 1911 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 189.5 | J/mol*K | N/A | Huffman and Borsook, 1932 | Extrapolation below 90 K, 55.69 J/mol*K.; DH |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 184.5 | 323. | Satoh and Sogabe, 1941 | T = 0 to 100°C. Mean value.; DH |
| 171.1 | 296.3 | Huffman and Borsook, 1932 | T = 87 to 295 K. Value is unsmoothed experimental datum.; 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.
Huffman, Ellis, et al., 1936
Huffman, H.M.; Ellis, E.L.; Fox, S.W.,
Thermal data. VI. The heats of combustion and free energies of seven organic compounds containing nitrogen,
J. Am. Chem. Soc., 1936, 58, 1728-1733. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Emery and Benedict, 1911
Emery, A.G.; Benedict, F.G.,
The heat of combustion of compounds of physiological importance,
Am. J. Physiol., 1911, 28, 301-307. [all data]
Huffman and Borsook, 1932
Huffman, H.M.; Borsook, H.,
Thermal data. I. The heat capacities, entropies and free energies of seven organic compounds containing nitrogen,
J. Am. Chem. Soc., 1932, 54, 4297-4301. [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. (3), Sci.,
Pap. Inst. Phys. Chem. Res. (Tokyo), 1941, 38, 238-245. [all data]
Notes
Go To: Top, Condensed phase 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) 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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