2-Butynedioic acid

• Formula: C₄H₂O₄
• Molecular weight: 114.0563
• IUPAC Standard InChI: InChI=1S/C4H2O4/c5-3(6)1-2-4(7)8/h(H,5,6)(H,7,8) Copy

  
• IUPAC Standard InChIKey: YTIVTFGABIZHHX-UHFFFAOYSA-N Copy
• CAS Registry Number: 142-45-0
• 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: Acetylenedicarboxylic acid; Butynedioic acid
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• Information on this page:
  • Phase change data
  • Reaction thermochemistry data
  • References
  • Notes
• Other data available:
  • Mass spectrum (electron ionization)
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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 by: Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

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 by: 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

2 +  =

By formula: 2H₂ + C₄H₂O₄ = C₄H₆O₄

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.

Smith and Carlson, 1939
Smith, L.I.; Carlson, E.J., Prehnitic Acid (Benzene-1,2,3,4-tetracroxylic Acid), J. Am. Chem. Soc., 1939, 61, 288. [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, Phase change data, Reaction thermochemistry data, References

• Symbols used in this document:
  

  Tfus	Fusion (melting) point
  ΔrH°	Enthalpy of reaction at standard conditions

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