Ethanedioic acid, dimethyl ester

• Formula: C₄H₆O₄
• Molecular weight: 118.0880
• IUPAC Standard InChI: InChI=1S/C4H6O4/c1-7-3(5)4(6)8-2/h1-2H3 Copy

  
• IUPAC Standard InChIKey: LOMVENUNSWAXEN-UHFFFAOYSA-N Copy
• CAS Registry Number: 553-90-2
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Oxalic acid, dimethyl ester; Dimethyl oxalate; Methyl oxalate; CH3OCOCOOCH3; Dimethyl ester of oxalic acid; Ethanedioc acid dimethyl ester
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• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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Gas 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

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
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Enthalpy of sublimation

Enthalpy of fusion

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 by: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

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.

Anthoney, Carson, et al., 1976
Anthoney, M.E.; Carson, A.S.; Laye, P.G.; Yrekli, M., The enthalpy of formation of dimethyl oxalate, J. Chem. Thermodyn., 1976, 8, 1009-1010. [all data]

Anthoney, Carson, et al., 1975
Anthoney, M.E.; Carson, A.S.; Laye, P.G., The thermochemistry of formates and oxalates, Conf. Int. Thermodyn. Chim. C.R. 4th, 1975, 1, 99-103. [all data]

Anthoney, Finch, et al., 1975
Anthoney, M.E.; Finch, A.; Stephens, M., The solution of dimethyl oxalate and oxalic acid in water and alkali. Standard enthalpy of formation of dimethyl oxalate, Thermochim. Acta, 1975, 12, 427-431. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Lecat, 1927
Lecat, M., New binary azeotropes: 6th list, Ann. Soc. Sci. Bruxelles, Ser. B, 1927, 47, 63-71. [all data]

Lecat, 1926
Lecat, M., New binary azeotropes: 3rd list, Ann. Soc. Sci. Bruxelles, Ser. B, 1926, 45, 284-94. [all data]

Anthoney, Carson, et al., 1976, 2
Anthoney, M.E.; Carson, A.S.; Carson, P.G.; Laye, P.G.; Yurckli, M., J. Chem. Thermodyn., 1976, 8, 1009. [all data]

Bruner, 1894
Bruner, L., The heats of fusion of some organic compounds, Ber. Dtsch. Chem. Ges., 1894, 27, 2102. [all data]

Stern and Kay, 1957
Stern, S.A.; Kay, W.B., The Critical Pressure and Temperature of Dimethyl Oxalate, J. Phys. Chem., 1957, 61, 374. [all data]

Weger, 1883
Weger, F., Justus Liebigs Ann. Chem., 1883, 221, 61. [all data]

Regnault, 1862
Regnault, V., Mem. Acad. Sci. Inst. Fr., 1862, 26, 335. [all data]

Verevkin, Kozlova, et al., 2006
Verevkin, Sergey P.; Kozlova, Svetlana A.; Emel'yanenko, Vladimir N.; Nikitin, Eugene D.; Popov, Alexander P.; Krasnykh, Eugen L., Vapor Pressures, Enthalpies of Vaporization, and Critical Parameters of a Series of Linear Aliphatic Dimethyl Esters of Dicarboxylic Acids, J. Chem. Eng. Data, 2006, 51, 5, 1896-1905, https://doi.org/10.1021/je0602418 . [all data]

Ma, Liu, et al., 2004
Ma, Xin-Bin; Liu, Xin-Gang; Li, Zhen-Hua; Xu, Gen-Hui, Vapor--liquid equilibria for the ternary system methanol + dimethyl carbonate + dimethyl oxalate and constituent binary systems at different temperatures, Fluid Phase Equilibria, 2004, 221, 1-2, 51-56, https://doi.org/10.1016/j.fluid.2004.04.018 . [all data]

Chickos, Sabbah, et al., 1996
Chickos, J.S.; Sabbah, R.; Hosseini, S.; Liebman, J.F., The sublimation enthalpy of dimethyl oxalate, Struct. Chem., 1996, 7, 391-395. [all data]

Askonas and Daubert, 1988
Askonas, Charles F.; Daubert, Thomas E., Vapor pressure determination of eight oxygenated compounds, J. Chem. Eng. Data, 1988, 33, 3, 225-229, https://doi.org/10.1021/je00053a001 . [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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [all data]

McGlynn and Meeks, 1976
McGlynn, S.P.; Meeks, J.L., Photoelectron spectra of carbonyls, carbonates, oxalates and esterification effects, J. Electron Spectrosc. Relat. Phenom., 1976, 8, 85. [all data]

Notes

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• Symbols used in this document:
  

  Pc	Critical pressure
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation 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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