2-Propynoic acid, methyl ester

• Formula: C₄H₄O₂
• Molecular weight: 84.0734
• IUPAC Standard InChI: InChI=1S/C4H4O2/c1-3-4(5)6-2/h1H,2H3 Copy

  
• IUPAC Standard InChIKey: IMAKHNTVDGLIRY-UHFFFAOYSA-N Copy
• CAS Registry Number: 922-67-8
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Other names: Propiolic acid, methyl ester; Methyl acetylenecarboxylate; Methyl ethynecarboxylate; Methyl propiolate; Methyl propynoate; Acetylenecarboxylic acid methyl ester; Propynoic acid, methyl ester; NSC 154164
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• Information on this page:
  • Reaction thermochemistry data
  • IR Spectrum
  • References
  • Notes
• Other data available:
  • Phase change data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
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Reaction 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:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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Individual Reactions

C₄H₃O₂^- +  =

By formula: C₄H₃O₂^- + H⁺ = C₄H₄O₂

 +  = C₂₄H₁₈O₃

By formula: C₂₀H₁₄O + C₄H₄O₂ = C₂₄H₁₈O₃

2 +  =

By formula: 2H₂ + C₄H₄O₂ = C₄H₈O₂

IR Spectrum

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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

Gas Phase Spectrum

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Additional Data

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.

Taft and Topsom, 1987
Taft, R.W.; Topsom, R.D., The Nature and Analysis of Substituent Effects, Prog. Phys. Org. Chem., 1987, 16, 1. [all data]

Samuilov, Nurullina, et al., 1983
Samuilov, Ya.D.; Nurullina, R.L.; Konovalov, A.I., Thermochemical and kinetic study of the Diels-Alder reaction with ethylene and acetylene dienophiles, Zh. Org. Khim., 1983, 19, 1431-1435. [all data]

Flitcroft and Skinner, 1958
Flitcroft, T.L.; Skinner, H.A., Heats of hydrogenation Part 2.-Acetylene derivatives, Trans. Faraday Soc., 1958, 54, 47-53. [all data]

Notes

Go To: Top, Reaction thermochemistry data, IR Spectrum, References

• Symbols used in this document:
  

  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

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