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
  The 3d structure may be viewed using Java or Javascript.
• 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:
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • IR Spectrum
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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:
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

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

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

C₄H₃O₂^- +  =

By formula: C₄H₃O₂^- + H⁺ = C₄H₄O₂

 +  = C₂₄H₁₈O₃

By formula: C₂₀H₁₄O + C₄H₄O₂ = C₂₄H₁₈O₃

2 +  =

By formula: 2H₂ + C₄H₄O₂ = C₄H₈O₂

Gas phase ion energetics 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
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Ionization energy determinations

De-protonation reactions

C₄H₃O₂^- +  =

By formula: C₄H₃O₂^- + H⁺ = C₄H₄O₂

Mass spectrum (electron ionization)

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, References, Notes

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, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, 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.

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Farchan Laboratories, 1990
Farchan Laboratories, Research Chemicals Catalog, Farchan Laboratories, Gainesville, FL, 1990, 91. [all data]

Chickos, Hosseini, et al., 1995
Chickos, James S.; Hosseini, Sarah; Hesse, Donald G., Determination of vaporization enthalpies of simple organic molecules by correlations of changes in gas chromatographic net retention times, Thermochimica Acta, 1995, 249, 41-62, https://doi.org/10.1016/0040-6031(95)90670-3 . [all data]

Azandegbe, 1987
Azandegbe, E.C., Analusis, 1987, 15, 370. [all data]

Fuchs and Peacock, 1980
Fuchs, Richard; Peacock, L. Alan, Heats of vaporization of esters by the gas chromatography--calorimetry method, Can. J. Chem., 1980, 58, 24, 2796-2799, https://doi.org/10.1139/v80-447 . [all data]

Svoboda, Uchytilová, et al., 1980
Svoboda, Václav; Uchytilová, Vera; Majer, Vladimír; Pick, Jirí, Heats of vaporization of alkyl esters of formic, acetic and propionic acids, Collect. Czech. Chem. Commun., 1980, 45, 12, 3233-3240, https://doi.org/10.1135/cccc19803233 . [all data]

Sunner, Svensson, et al., 1979
Sunner, S.; Svensson, Ch.; Zelepuga, A.S., Enthalpies of vaporization at 298.15 K for some 2-alkanones and methyl alkanoates, J. Chem. Thermodyn., 1979, 11, 491-495. [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]

Polák and Mertl, 1965
Polák, J.; Mertl, I., Saturated vapour pressure of methyl acetate, ethyl acetate, n-propyl acetate, methyl propionate, and ethyl propionate, Collect. Czech. Chem. Commun., 1965, 30, 10, 3526-3528, https://doi.org/10.1135/cccc19653526 . [all data]

Svoboda, Veselý, et al., 1977
Svoboda, V.; Veselý, F.; Holub, R.; Pick, J., Heats of vaporization of alkyl acetates and propionates, Collect. Czech. Chem. Commun., 1977, 42, 3, 943-951, https://doi.org/10.1135/cccc19770943 . [all data]

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]

Bieri, Asbrink, et al., 1982
Bieri, G.; Asbrink, L.; Von Niessen, W., 30.4-nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1982, 27, 129. [all data]

Notes

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  Tboil	Boiling point
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

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