α-Aminoisobutanoic acid

• Formula: C₄H₉NO₂
• Molecular weight: 103.1198
• IUPAC Standard InChI: InChI=1S/C4H9NO2/c1-4(2,5)3(6)7/h5H2,1-2H3,(H,6,7) Copy

  
• IUPAC Standard InChIKey: FUOOLUPWFVMBKG-UHFFFAOYSA-N Copy
• CAS Registry Number: 62-57-7
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Alanine, 2-methyl-; α-Aminoisobutyric acid; α-Methylalanine; α,α-Dimethylglycine; AIB; Propionic acid, 2-amino-2-methyl-; 2-Amino-2-methylpropanoic acid; 2-Aminoisobutyric acid; 2-Methylalanine; Propanoic acid, 2-amino-2-methyl-; 2-Amino-2-methylpropionic acid; NSC 16590
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
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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

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 by: William E. Acree, Jr., James S. Chickos

Enthalpy of sublimation

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• SOLID (NUJOL MULL); PERKIN-ELMER 21 (GRATING) $$SPECTRAL CONTAMINATION DUE TO OIL AROUND 2900 CM^-1; 2 cm^-1 resolution
• SOLID (OIL MULL) $$SPECTRAL CONTAMINATION DUE TO OIL AROUND 1450 CM^-1; BAIRD (PRISM); DIGITIZED BY COBLENTZ SOCIETY (BATCH II) FROM HARD COPY; 2 cm^-1 resolution
• SOLID (SPLIT MULL), FLUOROLUBE FOR 3800-1330 CM^-1, NUJOL FOR 1330-460 CM^-1; DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH I) FROM HARD COPY; 2 cm^-1 resolution

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

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Steele, Chirico, et al., 1997
Steele, W.V.; Chirico, R.D.; Cowell, A.B.; Knipmeyer, S.E.; Nguyen, A., Thermodynamic properties and ideal-gas enthalpies of formation for 2-aminoisobutyric acid (2-methylalanine), acetic acid, (4-methyl-3-penten-2-one), 4-methylpent-1-ene, 2,2'-bis(phenylthio)propane, and glycidyl phenyl ether (1,2-epoxy-3-phenoxypropane), J. Chem. Eng. Data, 1997, 42, 1052-1066. [all data]

Contineanu and Marchidan, 1994
Contineanu, J.; Marchidan, D.I., The enthalpies of combustion and formation of some isomers of aminobutyric (aminobutanoic) acid, Rev. Roum. Chim., 1994, 39, 1391-1395. [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]

Svec and Clyde, 1965
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]

Notes

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• Symbols used in this document:
  

  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions
  ΔsubH	Enthalpy of sublimation

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