N-Acetyl-D-leucine amide
- Formula: C8H16N2O2
- Molecular weight: 172.2248
- IUPAC Standard InChI: InChI=1S/C8H16N2O2/c1-5(2)4-7(8(9)12)10-6(3)11/h5,7H,4H2,1-3H3,(H2,9,12)(H,10,11)/t7-/m1/s1
- IUPAC Standard InChIKey: PHPXQAHAQREGGN-SSDOTTSWSA-N
- CAS Registry Number: 16624-68-3
- Chemical structure:
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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
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 28.78 ± 0.1 | kcal/mol | N/A | Vecchio, Barone, et al., 1999 | AC |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 27.44 ± 0.07 | 393. | C | Vecchio, Barone, et al., 1999 | AC |
| 24.1 ± 0.7 | 388. | TE | Ferro, Della Gatta, et al., 1988 | Based on data from 374. to 401. K. See also Barone, Ferro, et al., 1986.; AC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 4.8279 | 404.0 | Ferro, Della Gatta, et al., 1988 | DH |
| 4.83 | 404. | Domalski and Hearing, 1996 | AC |
Entropy of fusion
| ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 12.0 | 404.0 | Ferro, Della Gatta, et al., 1988 | DH |
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.
Vecchio, Barone, et al., 1999
Vecchio, Pompea Del; Barone, Guido; Sabbah, Raphaël; Gatta, Giuseppe Della; Abate, Lorenzo,
Thermodynamics of sublimation ofN-acetyl amides of some amino acids,
The Journal of Chemical Thermodynamics, 1999, 31, 8, 1001-1008, https://doi.org/10.1006/jcht.1999.0504
. [all data]
Ferro, Della Gatta, et al., 1988
Ferro, D.; Della Gatta, G.; Barone, G.,
Enthalpies of sublimation and fusion for N-acetyl substituted glycine, L-alanine, and D-leucine amides,
J. Therm. Anal., 1988, 34, 835-841. [all data]
Barone, Ferro, et al., 1986
Barone, G.; Ferro, D.; Fiorani, P.; Mattia, C.A.; Puliti, R.,
J. Calorim. Anal. Therm. Thermodyn. Chim., 1986, 17, 471. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Notes
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- Symbols used in this document:
ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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