L-Isoleucine

• Formula: C₆H₁₃NO₂
• Molecular weight: 131.1729
• IUPAC Standard InChI: InChI=1S/C6H13NO2/c1-3-4(2)5(7)6(8)9/h4-5H,3,7H2,1-2H3,(H,8,9)/t4-,5+/m0/s1 Copy

  
• IUPAC Standard InChIKey: AGPKZVBTJJNPAG-CRCLSJGQSA-N Copy
• CAS Registry Number: 73-32-5
• Chemical structure:
  This structure is also available as a 2d Mol file
• Stereoisomers:
  • allo-L-isoleucine
  • DL-Isoleucine
• Other names: Isoleucine, L-; α-Amino-β-methylvaleric acid, (2S,3S)-; Acetic acid, amino(1-methylpropyl)-, (R*,R*)-; L-(+)-Isoleucine; L-Norvaline, 3-methyl-, erythro-; Norvaline, 3-methyl-, erythro-; Pentanoic acid, 2-amino-3-methyl-, (2S,3S)-; Pentanoic acid, 2-amino-3-methyl-, [S-(R*,R*)]-; Valeric acid, 2-amino-3-methyl-; 2-Amino-3-methylpentanoic acid, (S-(R*,R*))-; 2-Amino-3-methylvaleric acid; sec-C4H9CH(NH2)COOH; Acetic acid, amino-sec-butyl-; [S-(R*,R*)]-2-Amino-3-methylpentanoic acid; (2S,3S)-2-Amino-3-methylpentanoic acid; (2S,3S)-α-Amino-β-methyl-n-valeric acid; (S)-Isoleucine; (S,S)-Isoleucine; 2S,3S-Isoleucine; L-Ile; Isoleucine; NSC 46708; erythro-L-Isoleucine
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Condensed phase thermochemistry data
  • References
  • Notes
• Other data available:
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
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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

Constant pressure heat capacity of solid

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.

Wu, Zhu, et al., 1993
Wu, D.; Zhu, Y.; Gao, Z.; Qu, S., Determination of combustion heat of some amino acids, Wuhan Daxue Xuebao Ziran Kexueban, 1993, 78-82. [all data]

Hutchens, Cole, et al., 1963
Hutchens, J.O.; Cole, A.G.; Stout, J.W., Heat capacities from 11 to 305°K., entropies, and free energies of formation of L-valine, L-isoleucine, and L-leucine, J. Phys. Chem., 1963, 67, 1128-1130. [all data]

Tsuzuki, Harper, et al., 1958
Tsuzuki, T.; Harper, D.O.; Hunt, H., Heats of combustion. VII. The heats of combustion of some amino acids, J. Phys. Chem., 1958, 62, 1594-1595. [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]

Notes

Go To: Top, Condensed phase thermochemistry data, References

• Symbols used in this document:
  

  Cp,solid	Constant pressure heat capacity of solid
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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