DL-Leucine

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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-153.13 ± 0.21kcal/molCcbHuffman, Fox, et al., 1937Author's hf298=-154.25 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Δcsolid-855.23 ± 0.21kcal/molCcbHuffman, Fox, et al., 1937Author's hf298=-154.25 kcal/mol; ALS
Quantity Value Units Method Reference Comment
solid,1 bar49.50cal/mol*KN/AHuffman and Ellis, 1937Extrapolation below 90 K, 58.20 J/mol*K.; DH

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
46.439296.6Huffman and Ellis, 1937T = 86 to 297 K. Value is unsmoothed experimental datum.; DH

Ion clustering 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: Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

Sodium ion (1+) + DL-Leucine = (Sodium ion (1+) • DL-Leucine)

By formula: Na+ + C6H13NO2 = (Na+ • C6H13NO2)

Quantity Value Units Method Reference Comment
Δr41.8kcal/molCIDCKish, Ohanessian, et al., 2003Anchor alanine=39.89

References

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

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]

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]

Kish, Ohanessian, et al., 2003
Kish, M.M.; Ohanessian, G.; Wesdemiotis, C., The Na+ affinities of a-amino acids: side-chain substituent effects, Int. J. Mass Spectrom., 2003, 227, 3, 509, https://doi.org/10.1016/S1387-3806(03)00082-4 . [all data]


Notes

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