Selected ATcT [1, 2] enthalpy of formation based on version 1.122g of the Thermochemical Network [3] This version of ATcT results was generated from an expansion of version 1.122e [4] to include results centered on the determination of the appearance energy of CH3+ from CH4. [5].
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| Species Name |
Formula |
Image |
ΔfH°(0 K) |
ΔfH°(298.15 K) |
Uncertainty |
Units |
Relative
Molecular
Mass |
ATcT ID |
| Acetic acid | CH3C(O)OH (g, syn) |  | -418.88 | -433.00 | ± 0.43 | kJ/mol | 60.0520 ±
0.0017 | 64-19-7*1 |
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Representative Geometry of CH3C(O)OH (g, syn) |
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Top contributors to the provenance of ΔfH° of CH3C(O)OH (g, syn)The 20 contributors listed below account only for 67.5% of the provenance of ΔfH° of CH3C(O)OH (g, syn).
A total of 87 contributors would be needed to account for 90% of the provenance.
Please note: The list is limited to 20 most important contributors or, if less, a number sufficient to account for 90% of the provenance. The Reference acts as a further link to the relevant references and notes for the measurement. The Measured Quantity is normaly given in the original units; in cases where we have reinterpreted the original measurement, the listed value may differ from that given by the authors. The quoted uncertainty is the a priori uncertainty used as input when constructing the initial Thermochemical Network, and corresponds either to the value proposed by the original authors or to our estimate; if an additional multiplier is given in parentheses immediately after the prior uncertainty, it corresponds to the factor by which the prior uncertainty needed to be multiplied during the ATcT analysis in order to make that particular measurement consistent with the prevailing knowledge contained in the Thermochemical Network.
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Contribution
(%) | TN
ID | Reaction | Measured Quantity | Reference | | 16.0 | 3770.4 | CH3C(O)OH (l) → CH3C(O)OH (g) | ΔrH°(298.15 K) = 50.3 ± 1.0 kJ/mol | Verevkin 2000, note unc | | 11.8 | 3766.2 | CH3C(O)OH (g) → OH (g) + [CH3CO]+ (g) | ΔrH°(0 K) = 11.641 ± 0.008 eV | Shuman 2010 | | 9.0 | 3761.11 | CH3C(O)OH (g, syn) → 2 C (g) + 4 H (g) + 2 O (g) | ΔrH°(0 K) = 764.37 ± 0.30 (×1.114) kcal/mol | Karton 2011 | | 7.1 | 3770.3 | CH3C(O)OH (l) → CH3C(O)OH (g) | ΔrH°(298.15 K) = 51.6 ± 1.5 kJ/mol | Konicek 1970 | | 3.2 | 3761.10 | CH3C(O)OH (g, syn) → 2 C (g) + 4 H (g) + 2 O (g) | ΔrH°(0 K) = 764.28 ± 0.56 kcal/mol | Karton 2011 | | 2.7 | 3791.1 | CH3C(O)OCH3 (l) + 7/2 O2 (g) → 3 CO2 (g) + 3 H2O (cr,l) | ΔrH°(298.15 K) = -380.53 ± 0.16 kcal/mol | Hall 1971 | | 2.4 | 5184.1 | CH3C(O)CH3 (g) → [CH3CO]+ (g) + CH3 (g) | ΔrH°(0 K) = 10.532 ± 0.006 eV | Bodi 2015 | | 2.3 | 3770.1 | CH3C(O)OH (l) → CH3C(O)OH (g) | ΔrH°(298.15 K) = 51.60 ± 2.6 kJ/mol | Majer 1985 | | 1.8 | 3766.1 | CH3C(O)OH (g) → OH (g) + [CH3CO]+ (g) | ΔrH°(0 K) = 11.62 ± 0.02 eV | Traeger 1982, AE corr, est unc | | 1.1 | 3769.5 | CH3C(O)OH (g, syn) + CH2O (g) → HC(O)OH (g, syn) + CH3CHO (g) | ΔrH°(0 K) = -0.67 ± 0.85 kcal/mol | Ruscic W1RO | | 1.1 | 3768.8 | CH3C(O)OH (g, syn) + CH4 (g) → HC(O)OH (g, syn) + CH3CH3 (g) | ΔrH°(0 K) = 10.53 ± 0.9 kcal/mol | Ruscic W1RO | | 1.0 | 3769.4 | CH3C(O)OH (g, syn) + CH2O (g) → HC(O)OH (g, syn) + CH3CHO (g) | ΔrH°(0 K) = -0.44 ± 0.90 kcal/mol | Ruscic CBS-n | | 1.0 | 3769.1 | CH3C(O)OH (g, syn) + CH2O (g) → HC(O)OH (g, syn) + CH3CHO (g) | ΔrH°(0 K) = -0.31 ± 0.90 kcal/mol | Ruscic G3X | | 1.0 | 3769.2 | CH3C(O)OH (g, syn) + CH2O (g) → HC(O)OH (g, syn) + CH3CHO (g) | ΔrH°(0 K) = -0.45 ± 0.90 kcal/mol | Ruscic G4 | | 1.0 | 3770.2 | CH3C(O)OH (l) → CH3C(O)OH (g) | ΔrH°(298.15 K) = 52.3 ± 4 kJ/mol | NBS Tables 1989 | | 0.8 | 3768.4 | CH3C(O)OH (g, syn) + CH4 (g) → HC(O)OH (g, syn) + CH3CH3 (g) | ΔrH°(0 K) = 10.71 ± 1.0 kcal/mol | Ruscic G4 | | 0.8 | 3768.7 | CH3C(O)OH (g, syn) + CH4 (g) → HC(O)OH (g, syn) + CH3CH3 (g) | ΔrH°(0 K) = 10.97 ± 1.0 kcal/mol | Ruscic CBS-n | | 0.8 | 5275.1 | (CH3CO)2 (cr,l) → (CH3CO)2 (g) | ΔrH°(298.15 K) = 9.25 ± 0.25 kcal/mol | Nicholson 1954 | | 0.8 | 3896.3 | CH3CH2C(O)OH (cr,l) → CH3CH2C(O)OH (g) | ΔrH°(298.15 K) = 54.5 ± 1. kJ/mol | Verevkin 2000, note unc2 | | 0.8 | 3896.2 | CH3CH2C(O)OH (cr,l) → CH3CH2C(O)OH (g) | ΔrH°(298.15 K) = 54.88 ± 1. kJ/mol | Chickos 1995, est unc |
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Top 10 species with enthalpies of formation correlated to the ΔfH° of CH3C(O)OH (g, syn) |
Please note: The correlation coefficients are obtained by renormalizing the off-diagonal elements of the covariance matrix by the corresponding variances.
The correlation coefficient is a number from -1 to 1, with 1 representing perfectly correlated species, -1 representing perfectly anti-correlated species, and 0 representing perfectly uncorrelated species.
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Correlation
Coefficent
(%) | Species Name | Formula | Image | ΔfH°(0 K) | ΔfH°(298.15 K) | Uncertainty | Units | Relative
Molecular
Mass | ATcT ID | | 100.0 | Acetic acid | CH3C(O)OH (g) |  | -418.88 | -433.01 | ± 0.43 | kJ/mol | 60.0520 ±
0.0017 | 64-19-7*0 | | 40.3 | Acetic acid | CH3C(O)OH (g, anti) |  | -397.89 | -411.66 | ± 0.84 | kJ/mol | 60.0520 ±
0.0017 | 64-19-7*2 | | 37.4 | Acetate | [CH3C(O)O]- (g) | ![CC(=O)[O-]](../images/366.png) | -496.6 | -505.7 | ± 1.2 | kJ/mol | 59.0446 ±
0.0017 | 71-50-1*0 | | 37.2 | Acetoxy | CH3C(O)O (g) | ![CC(=O)[O]](../images/1308.png) | -182.7 | -191.4 | ± 1.2 | kJ/mol | 59.0440 ±
0.0017 | 13799-69-4*0 | | 37.2 | Acetoxy | CH3C(O)O (g, 2A") | ![CC(=O)[O]](../images/1303.png) | -182.7 | -191.5 | ± 1.2 | kJ/mol | 59.0440 ±
0.0017 | 13799-69-4*1 | | 34.8 | Acetylium | [CH3CO]+ (g) | ![C[C+]=O](../images/247.png) | 666.41 | 659.13 | ± 0.46 | kJ/mol | 43.0441 ±
0.0016 | 15762-07-9*0 | | 23.2 | Carboxymethyl | CH2C(O)OH (g, syn) | ![[CH2]C(=O)O](../images/433.png) | -227.4 | -237.3 | ± 1.2 | kJ/mol | 59.0440 ±
0.0017 | 2887-46-9*1 | | 23.2 | Carboxymethyl | CH2C(O)OH (g) | ![[CH2]C(=O)O](../images/1465.png) | -227.4 | -237.3 | ± 1.2 | kJ/mol | 59.0440 ±
0.0017 | 2887-46-9*0 | | 20.8 | 2,3-Butanedione | (CH3CO)2 (g) |  | -310.53 | -327.10 | ± 0.70 | kJ/mol | 86.0892 ±
0.0033 | 431-03-8*0 | | 20.7 | Methyl acetate | CH3C(O)OCH3 (g, syn) |  | -394.28 | -413.15 | ± 0.61 | kJ/mol | 74.0785 ±
0.0025 | 79-20-9*1 |
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Most Influential reactions involving CH3C(O)OH (g, syn)Please note: The list, which is based on a hat (projection) matrix analysis, is limited to no more than 20 largest influences.
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Influence
Coefficient | TN
ID | Reaction | Measured Quantity | Reference | | 1.000 | 3763.1 | CH3C(O)OH (g) → CH3C(O)OH (g, syn) | ΔrH°(0 K) = 0 ± 0 cm-1 | Ruscic G3B3 | | 0.130 | 3834.5 | CH3C(O)OCH3 (g, syn) + HOCO (g, trans) → CH3OCO (g, anti-staggered) + CH3C(O)OH (g, syn) | ΔrH°(0 K) = 0.98 ± 0.85 kcal/mol | Ruscic W1RO | | 0.128 | 3878.5 | CH2C(O)OCH3 (g, syn) + CH3C(O)OH (g, syn) → CH3C(O)OCH3 (g, syn) + CH2C(O)OH (g, syn) | ΔrH°(0 K) = 0.05 ± 0.85 kcal/mol | Ruscic W1RO | | 0.116 | 3834.4 | CH3C(O)OCH3 (g, syn) + HOCO (g, trans) → CH3OCO (g, anti-staggered) + CH3C(O)OH (g, syn) | ΔrH°(0 K) = 1.10 ± 0.90 kcal/mol | Ruscic CBS-n | | 0.116 | 3834.1 | CH3C(O)OCH3 (g, syn) + HOCO (g, trans) → CH3OCO (g, anti-staggered) + CH3C(O)OH (g, syn) | ΔrH°(0 K) = 1.01 ± 0.90 kcal/mol | Ruscic G3X | | 0.116 | 3834.2 | CH3C(O)OCH3 (g, syn) + HOCO (g, trans) → CH3OCO (g, anti-staggered) + CH3C(O)OH (g, syn) | ΔrH°(0 K) = 0.65 ± 0.90 kcal/mol | Ruscic G4 | | 0.114 | 3878.4 | CH2C(O)OCH3 (g, syn) + CH3C(O)OH (g, syn) → CH3C(O)OCH3 (g, syn) + CH2C(O)OH (g, syn) | ΔrH°(0 K) = 0.12 ± 0.90 kcal/mol | Ruscic CBS-n | | 0.114 | 3878.1 | CH2C(O)OCH3 (g, syn) + CH3C(O)OH (g, syn) → CH3C(O)OCH3 (g, syn) + CH2C(O)OH (g, syn) | ΔrH°(0 K) = 0.09 ± 0.90 kcal/mol | Ruscic G3X | | 0.114 | 3878.2 | CH2C(O)OCH3 (g, syn) + CH3C(O)OH (g, syn) → CH3C(O)OCH3 (g, syn) + CH2C(O)OH (g, syn) | ΔrH°(0 K) = 0.41 ± 0.90 kcal/mol | Ruscic G4 | | 0.110 | 3848.5 | [CH3C(O)O]- (g) + C6H5OH (g) → CH3C(O)OH (g, syn) + [C6H5O]- (g) | ΔrH°(0 K) = 1.57 ± 0.8 kcal/mol | Ruscic W1RO | | 0.106 | 3846.5 | [CH3C(O)O]- (g) + HC(O)OH (g, syn) → CH3C(O)OH (g, syn) + [HC(O)O]- (g) | ΔrH°(0 K) = -3.73 ± 0.8 kcal/mol | Ruscic W1RO | | 0.102 | 3765.8 | CH3C(O)OH (g, syn) + HC(O)OH (g, anti) → CH3C(O)OH (g, anti) + HC(O)OH (g, syn) | ΔrH°(0 K) = 346 ± 200 cm-1 | Ruscic W1RO | | 0.099 | 3850.5 | [CH3C(O)O]- (g) + HCN (g) → CH3C(O)OH (g, syn) + [CN]- (g) | ΔrH°(0 K) = 2.76 ± 0.8 kcal/mol | Ruscic W1RO | | 0.094 | 3761.11 | CH3C(O)OH (g, syn) → 2 C (g) + 4 H (g) + 2 O (g) | ΔrH°(0 K) = 764.37 ± 0.30 (×1.114) kcal/mol | Karton 2011 | | 0.094 | 3834.3 | CH3C(O)OCH3 (g, syn) + HOCO (g, trans) → CH3OCO (g, anti-staggered) + CH3C(O)OH (g, syn) | ΔrH°(0 K) = 1.13 ± 1.0 kcal/mol | Ruscic CBS-n | | 0.093 | 3765.7 | CH3C(O)OH (g, syn) + HC(O)OH (g, anti) → CH3C(O)OH (g, anti) + HC(O)OH (g, syn) | ΔrH°(0 K) = 355 ± 210 cm-1 | Ruscic CBS-n | | 0.093 | 3765.4 | CH3C(O)OH (g, syn) + HC(O)OH (g, anti) → CH3C(O)OH (g, anti) + HC(O)OH (g, syn) | ΔrH°(0 K) = 395 ± 210 cm-1 | Ruscic G4 | | 0.092 | 3869.5 | CH2C(O)OH (g, syn) + CH3CH3 (g) → CH3C(O)OH (g, syn) + CH3CH2 (g) | ΔrH°(0 K) = 1.72 ± 0.9 kcal/mol | Ruscic W1RO | | 0.092 | 3878.3 | CH2C(O)OCH3 (g, syn) + CH3C(O)OH (g, syn) → CH3C(O)OCH3 (g, syn) + CH2C(O)OH (g, syn) | ΔrH°(0 K) = 0.06 ± 1.0 kcal/mol | Ruscic CBS-n | | 0.088 | 3818.5 | HC(O)OCH2CH3 (g, syn) + CH3C(O)OH (g, syn) → CH3CH2C(O)OH (g, syn) + HC(O)OCH3 (g, syn) | ΔrH°(0 K) = 2.77 ± 0.85 kcal/mol | Ruscic W1RO |
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References (for your convenience, also available in RIS and BibTex format)
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1
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B. Ruscic, R. E. Pinzon, M. L. Morton, G. von Laszewski, S. Bittner, S. G. Nijsure, K. A. Amin, M. Minkoff, and A. F. Wagner,
Introduction to Active Thermochemical Tables: Several "Key" Enthalpies of Formation Revisited.
J. Phys. Chem. A 108, 9979-9997 (2004)
[DOI: 10.1021/jp047912y]
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2
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B. Ruscic, R. E. Pinzon, G. von Laszewski, D. Kodeboyina, A. Burcat, D. Leahy, D. Montoya, and A. F. Wagner,
Active Thermochemical Tables: Thermochemistry for the 21st Century.
J. Phys. Conf. Ser. 16, 561-570 (2005)
[DOI: 10.1088/1742-6596/16/1/078]
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3
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B. Ruscic and D. H. Bross,
Active Thermochemical Tables (ATcT) values based on ver. 1.122g of the Thermochemical Network (2019); available at ATcT.anl.gov |
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4
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J. P. Porterfield, D. H. Bross, B. Ruscic, J. H. Thorpe, T. L. Nguyen, J. H. Baraban, J. F. Stanton, J. W. Daily, and G. B. Ellison,
Thermal Decomposition of Potential Ester Biofuels, Part I: Methyl Acetate and Methyl Butanoate.
J. Chem. Phys. A 121, 4658-4677 (2017)
[DOI: 10.1021/acs.jpca.7b02639] (Veronica Vaida Festschrift)
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5
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Y.-C. Chang, B. Xiong, D. H. Bross, B. Ruscic, and C. Y. Ng,
A Vacuum Ultraviolet laser Pulsed Field Ionization-Photoion Study of Methane (CH4): Determination of the Appearance Energy of Methylium From Methane with Unprecedented Precision and the Resulting Impact on the Bond Dissociation Energies of CH4 and CH4+.
Phys. Chem. Chem. Phys. 19, 9592-9605 (2017)
[DOI: 10.1039/c6cp08200a] (part of 2017 PCCP Hot Articles collection)
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6
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B. Ruscic,
Uncertainty Quantification in Thermochemistry, Benchmarking Electronic Structure Computations, and Active Thermochemical Tables.
Int. J. Quantum Chem. 114, 1097-1101 (2014)
[DOI: 10.1002/qua.24605]
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Formula
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The aggregate state is given in parentheses following the formula, such as: g - gas-phase, cr - crystal, l - liquid, etc.
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Uncertainties
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The listed uncertainties correspond to estimated 95% confidence limits, as customary in thermochemistry (see, for example, Ruscic [6]).
Note that an uncertainty of ± 0.000 kJ/mol indicates that the estimated uncertainty is < ± 0.0005 kJ/mol.
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Website Functionality Credits
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The reorganization of the website was developed and implemented by David H. Bross (ANL).
The find function is based on the complete Species Dictionary entries for the appropriate version of the ATcT TN.
The molecule images are rendered by Indigo-depict.
The XYZ renderings are based on Jmol: an open-source Java viewer for chemical structures in 3D. http://www.jmol.org/.
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Acknowledgement
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This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences under Contract No. DE-AC02-06CH11357.
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