dl-Alanine

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Condensed phase 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 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
Δfsolid-138.37 ± 0.68kcal/molCcbContineanu and Marchidan, 1984ALS
Δfsolid-134.71 ± 0.14kcal/molCcbHuffman, Fox, et al., 1937Author's hf298=-135.26 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Δcsolid-382.9 ± 0.68kcal/molCcbContineanu and Marchidan, 1984ALS
Δcsolid-386.55 ± 0.14kcal/molCcbHuffman, Fox, et al., 1937Author's hf298=-135.26 kcal/mol; ALS
Δcsolid-388.00 ± 0.05kcal/molCcbWrede, 1911ALS
Δcsolid-390.45kcal/molCcbFischer and Wrede, 1904Heat of combustion corrected for pressure; ALS
Quantity Value Units Method Reference Comment
solid,1 bar31.60cal/mol*KN/AHuffman and Ellis, 1937Extrapolation below 90 K, 36.99 J/mol*K.; DH

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
27.2298.Badelin, Kulikov, et al., 1990T = 298, 313, 333, 348 K.; DH
27.20298.Kulikov, Kozlov, et al., 1989T = 298 to 348 K.; DH
29.06298.15Spink and Wads, 1975DH
29.089297.5Huffman and Ellis, 1937T = 85 to 298 K. Value is unsmoothed experimental datum.; DH

Mass spectrum (electron ionization)

Go To: Top, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Japan AIST/NIMC Database- Spectrum MS-NW- 284
NIST MS number 228479

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References

Go To: Top, Condensed phase thermochemistry data, Mass spectrum (electron ionization), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Contineanu and Marchidan, 1984
Contineanu, I.; Marchidan, D.I., The enthalpies of combustion and formation of D-alanine, L-alanine, DL-alanine, and β-alanine, Rev. Roum. Chim., 1984, 29, 43-48. [all data]

Huffman, Fox, et al., 1937
Huffman, H.M.; Fox, S.W.; Ellis, E.L., Thermal data. VII. The heats of combustion of seven amino acids, J. Am. Chem. Soc., 1937, 59, 2144-21. [all data]

Wrede, 1911
Wrede, F., Uber die Bestimmung von Berbrennungswarmen mittels der kalorimetrischen Bombe unter Benutzung des Platinwiderstandsthermometers, Z. Phys. Chem. (Leipzig), 1911, 81-94. [all data]

Fischer and Wrede, 1904
Fischer, E.; Wrede, F., Uber die Verbrennungswarme einiger organischer Verbindungen, Sitzungsber. Dtsch. Akad. Wiss. Berlin Kl. Math. Phys. Tech., 1904, 687-715. [all data]

Huffman and Ellis, 1937
Huffman, H.M.; Ellis, E.L., Thermal data. VIII. The heat capacities, entropies and free energies of some amino acids, J. Am. Chem. Soc., 1937, 59, 2150-2152. [all data]

Badelin, Kulikov, et al., 1990
Badelin, V.G.; Kulikov, O.V.; Batagin, V.S.; Udzig, E.; Zielenkiewicz, A.; Zielenkiewicz, W.; Krestov, G.A., Physico-chemical properties of peptides and their solutions, Thermochim. Acta, 1990, 169, 81-93. [all data]

Kulikov, Kozlov, et al., 1989
Kulikov, O.V.; Kozlov, V.A.; Malenkina, L.I.; Badelin, V.G., Heat capacities of amino acids and peptides and excess characteristics ot their aqueous solutions, Sbornik Nauch. Trud., Termodin. Rast. neelect., Ivanovo, Inst. nevod. rast., 1989, Akad. [all data]

Spink and Wads, 1975
Spink, C.H.; Wads, I., Thermochemistry of solutions of biochemical model compounds. 4. The partial molar heat capacities of some amino acids in aqueous solution, J. Chem. Thermodynam., 1975, 7, 561-572. [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, Mass spectrum (electron ionization), References