L-Tryptophan

• Formula: C₁₁H₁₂N₂O₂
• Molecular weight: 204.2252
• IUPAC Standard InChI: InChI=1S/C11H12N2O2/c12-9(11(14)15)5-7-6-13-10-4-2-1-3-8(7)10/h1-4,6,9,13H,5,12H2,(H,14,15)/t9-/m1/s1 Copy

  
• IUPAC Standard InChIKey: QIVBCDIJIAJPQS-SECBINFHSA-N Copy
• CAS Registry Number: 73-22-3
• Chemical structure:
  This structure is also available as a 2d Mol file
• Stereoisomers:
  • Tryptophan
• Other names: Tryptophan, L-; L-α-amino-3-indolepropionic acid; Tryptophan; L-Tryptophane; α-Aminoindole-3-propionic acid; L-α-aminoindole-3-propionic acid; L-β-3-indolylalanine; EH 121; L-(-)-Tryptophan; L-Trp; Trp; Tryptophane; 1H-Indole-3-alanine; 1H-Indole-3-propanoic acid, α-amino-, (S)-; 2-Amino-3-indolylpropanoic acid; α'-Amino-3-indolepropionic acid; Alanine, 3-indol-3-yl-; Indole-3-alanine; Indole-3-propionic acid, α-amino-; NCI-C01729; Pacitron; Propionic acid, 2-amino-3-indol-3-yl-; L-Tryptofan; (S)-Tryptophan; (S)-α-Amino-1H-indole-3-propanoic acid; (-)-Tryptophan; 1H-Indole-3-alanine, (S)-; 3-Indol-3-ylalanine; L-Alanine, 3-(1H-indol-3-yl)-; NSC 13119
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• Information on this page:
  • Condensed phase thermochemistry data
  • References
  • Notes
• Other data available:
  • 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.

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]

Cole, Hutchens, et al., 1963
Cole, A.G.; Hutchens, J.O.; Stout, J.W., Heat capacities from 11 to 305°K. and entropies of L-phenylalanine, L-proline, L-tryptophane, and L-tyrosine. Some free energies of formation, J. Phys. Chem., 1963, 67, 1852-1855. [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

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