DL-Norleucine
- Formula: C6H13NO2
- Molecular weight: 131.1729
- IUPAC Standard InChIKey: LRQKBLKVPFOOQJ-UHFFFAOYSA-N
- CAS Registry Number: 616-06-8
- Chemical structure:
This structure is also available as a 2d Mol file - Stereoisomers:
- Other names: Norleucine, DL-; (.+/-.)-Norleucine; DL-α-Aminocaproic acid; 2-Aminohexanoic acid; Norleucine; 2-Aminohexanoic acid, dl-
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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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔcH°solid | -3579.8 ± 1.3 | kJ/mol | Ccb | Strepikheev, Skuratov, et al., 1955 | Reanalyzed by Cox and Pilcher, 1970, Original value = -3581. kJ/mol; At 293 °K |
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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
115. ± 0.4 | 455. | V | Svec and Clyde, 1965 | ALS |
114.5 ± 0.4 | 450. | ME | Svec and Clyde, 1965, 2 | Based on data from 435. to 469. K. See also Clyde and Svec, 1964 and Stephenson and Malanowski, 1987.; AC |
Enthalpy of phase transition
ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
4.200 | 390.4 | crystaline, II | crystaline, I | Petropavlov, Tsygankova, et al., 1988 | DH |
4.410 | 390. | crystaline, II | crystaline, I | Grunenberg, Bougeard, et al., 1984 | DH |
Entropy of phase transition
ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
10.7 | 390.4 | crystaline, II | crystaline, I | Petropavlov, Tsygankova, et al., 1988 | DH |
11.31 | 390. | crystaline, II | crystaline, I | Grunenberg, Bougeard, et al., 1984 | DH |
Mass spectrum (electron ionization)
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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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Owner | NIST Mass Spectrometry Data Center 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-9311 |
NIST MS number | 228157 |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), NIST Subscription Links, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Strepikheev, Skuratov, et al., 1955
Strepikheev, A.A.; Skuratov, S.M.; Shtekher, S.M.; Muromova, R.S.; Brykina, E.P.; Kachinskaya, O.N.,
Mutual interaction of amino and carboxyl groups in amino acids,
Dokl. Akad. Nauk SSSR, 1955, 102, 543-545. [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]
Svec and Clyde, 1965
Svec, H.J.; Clyde, D.D.,
Vapor pressures of some α-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 α-Amino Acids.,
J. Chem. Eng. Data, 1965, 10, 2, 151-152, https://doi.org/10.1021/je60025a024
. [all data]
Clyde and Svec, 1964
Clyde, D.D.; Svec, H.,
, U. S. Atomic Energy Comm. IS-790, 1964, 1. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Petropavlov, Tsygankova, et al., 1988
Petropavlov, N.N.; Tsygankova, I.G.; Teslenko, L.A.,
Microcalorimetric investigation of polymorphic transitions in organic crystals,
Sov. Phys. Crystallogr., 1988, 33(6), 853-855. [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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- Symbols used in this document:
ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔsubH Enthalpy of sublimation - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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