2-Propenoic acid

• Formula: C₃H₄O₂
• Molecular weight: 72.0627
• IUPAC Standard InChI: InChI=1S/C3H4O2/c1-2-3(4)5/h2H,1H2,(H,4,5) Copy

  
• IUPAC Standard InChIKey: NIXOWILDQLNWCW-UHFFFAOYSA-N Copy
• CAS Registry Number: 79-10-7
• 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: Acrylic acid; Acroleic acid; Ethylenecarboxylic acid; Propenoic acid; Vinylformic acid; CH2=CHCOOH; Propene acid; Kyselina akrylova; Rcra waste number U008; Glacial acrylic acid; NSC 4765
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• Information on this page:
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Henry's Law data
  • IR Spectrum
  • Mass spectrum (electron ionization)
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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 evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

De-protonation reactions

C₃H₃O₂^- +  =

By formula: C₃H₃O₂^- + H⁺ = C₃H₄O₂

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.

Van Dam and Oskam, 1978
Van Dam, H.; Oskam, A., He(I) and He(II) photoelectron spectra of some substituted ethylenes, J. Electron Spectrosc. Relat. Phenom., 1978, 13, 273. [all data]

Katrib and Rabalais, 1973
Katrib, A.; Rabalais, J.W., Electronic interaction between the vinyl group and its substituents, J. Phys. Chem., 1973, 77, 2358. [all data]

Graul, Schnute, et al., 1990
Graul, S.T.; Schnute, M.E.; Squires, R.R., Gas-Phase Acidities of Carboxylic Acids and Alcohols from Collision-Induced Dissociation of Dimer Cluster Ions, Int. J. Mass Spectrom. Ion Proc., 1990, 96, 2, 181, https://doi.org/10.1016/0168-1176(90)87028-F . [all data]

Notes

Go To: Top, Gas phase ion energetics data, References

• Symbols used in this document:
  

  IE (evaluated)	Recommended ionization energy
  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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