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Leucine

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Phase change 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:
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
148.7 ± 6.5401. - 517.TGALähde, Raula, et al., 2009AC
151. ± 0.8455.VSvec and Clyde, 1965ALS
150.6 ± 0.8455.MESvec and Clyde, 1965, 2Based on data from 446. - 464. K. See also Cox and Pilcher, 1970 and Clyde and Svec, 1964.; AC

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.200352.crystaline, IIcrystaline, IGrunenberg, Bougeard, et al., 1984DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
0.57352.crystaline, IIcrystaline, IGrunenberg, Bougeard, et al., 1984DH

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.

Lähde, Raula, et al., 2009
Lähde, Anna; Raula, Janne; Malm, Jari; Kauppinen, Esko I.; Karppinen, Maarit, Sublimation and vapour pressure estimation of l-leucine using thermogravimetric analysis, Thermochimica Acta, 2009, 482, 1-2, 17-20, https://doi.org/10.1016/j.tca.2008.10.009 . [all data]

Svec and Clyde, 1965
Svec, H.J.; Clyde, D.D., Vapor pressures of some «alpha»-amino acids, J. Chem. Eng. Data, 1965, 10, 151. [all data]

Svec and Clyde, 1965, 2
Svec, H.J.; Clyde, D.D., Vapor Pressures of Some «alpha»-Amino Acids., J. Chem. Eng. Data, 1965, 10, 2, 151-152, https://doi.org/10.1021/je60025a024 . [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [all data]

Clyde and Svec, 1964
Clyde, D.D.; Svec, H., , U. S. Atomic Energy Comm. IS-790, 1964, 1. [all data]

Grunenberg, Bougeard, et al., 1984
Grunenberg, A.; Bougeard, D.; Schrader, B., DSC-investigations of 22 crystalline neutral aliphatic amino acids in the temperature range 233 to 423 K, Thermochim. Acta, 1984, 77, 59-66. [all data]


Notes

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