Selected ATcT [1, 2] enthalpy of formation based on version 1.122p of the Thermochemical Network [3] This version of ATcT results was generated from an expansion of version 1.122o [4] to include an updated enthalpy of formation for Hydrazine. [5].
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| Species Name |
Formula |
Image |
ΔfH°(0 K) |
ΔfH°(298.15 K) |
Uncertainty |
Units |
Relative
Molecular
Mass |
ATcT ID |
| Tetraoxygen | O4 (g, C2h singlet) | | 145.8 | 142.2 | ± 3.8 | kJ/mol | 63.9976 ±
0.0012 | 12596-83-7*22 |
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Top contributors to the provenance of ΔfH° of O4 (g, C2h singlet)The 20 contributors listed below account only for 66.3% of the provenance of ΔfH° of O4 (g, C2h singlet).
A total of 40 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 | | 7.4 | 5732.2 | 1/2 O2 (g) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 7.91 ± 0.80 (×1.022) kcal/mol | Ruscic G4 | | 6.7 | 5732.1 | 1/2 O2 (g) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 7.89 ± 0.86 kcal/mol | Ruscic G3X | | 6.0 | 5732.4 | 1/2 O2 (g) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 9.61 ± 0.80 (×1.139) kcal/mol | Ruscic CBS-n | | 4.2 | 5732.3 | 1/2 O2 (g) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 9.01 ± 1.08 kcal/mol | Ruscic CBS-n | | 4.0 | 5737.5 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 3.01 ± 0.75 kcal/mol | Ruscic W1RO | | 3.5 | 5738.2 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D2d singlet) | ΔrH°(0 K) = 15.85 ± 0.80 kcal/mol | Ruscic G4 | | 3.5 | 5737.4 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 2.82 ± 0.80 kcal/mol | Ruscic CBS-n | | 3.5 | 5737.2 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 1.78 ± 0.80 kcal/mol | Ruscic G4 | | 3.1 | 5738.4 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D2d singlet) | ΔrH°(0 K) = 14.28 ± 0.80 (×1.067) kcal/mol | Ruscic CBS-n | | 3.0 | 5739.2 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D3h singlet) | ΔrH°(0 K) = 19.71 ± 0.80 kcal/mol | Ruscic G4 | | 2.6 | 5739.1 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D3h singlet) | ΔrH°(0 K) = 19.92 ± 0.86 kcal/mol | Ruscic G3X | | 2.4 | 5735.5 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.32 ± 0.75 kcal/mol | Ruscic W1RO | | 2.2 | 5739.4 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D3h singlet) | ΔrH°(0 K) = 18.18 ± 0.80 (×1.164) kcal/mol | Ruscic CBS-n | | 2.1 | 5735.4 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.74 ± 0.80 kcal/mol | Ruscic CBS-n | | 2.1 | 5735.2 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.44 ± 0.80 kcal/mol | Ruscic G4 | | 1.9 | 5738.3 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D2d singlet) | ΔrH°(0 K) = 14.31 ± 1.08 kcal/mol | Ruscic CBS-n | | 1.9 | 5737.3 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 3.18 ± 1.08 kcal/mol | Ruscic CBS-n | | 1.8 | 5735.1 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.06 ± 0.86 kcal/mol | Ruscic G3X | | 1.7 | 5730.4 | 1/2 O2 (g) → 1/4 O4 (g, D2h singlet) | ΔrH°(0 K) = 4.87 ± 0.80 kcal/mol | Ruscic CBS-n | | 1.7 | 5730.2 | 1/2 O2 (g) → 1/4 O4 (g, D2h singlet) | ΔrH°(0 K) = 3.47 ± 0.80 kcal/mol | Ruscic G4 |
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Top 10 species with enthalpies of formation correlated to the ΔfH° of O4 (g, C2h singlet) |
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 | | 41.2 | Tetraoxygen | O4 (g, D2h singlet) | | 69.8 | 65.1 | ± 4.4 | kJ/mol | 63.9976 ±
0.0012 | 12596-83-7*21 | | 35.4 | Tetraoxygen | O4 (g, C2h triplet) | | 104.4 | 102.4 | ± 3.5 | kJ/mol | 63.9976 ±
0.0012 | 12596-83-7*11 | | 34.0 | Tetraoxygen | O4 (g, D3h singlet) | | 465.6 | 459.6 | ± 4.2 | kJ/mol | 63.9976 ±
0.0012 | 12596-83-7*24 | | 31.4 | Tetraoxygen | O4 (g, D2d singlet) | | 399.0 | 393.2 | ± 3.9 | kJ/mol | 63.9976 ±
0.0012 | 12596-83-7*23 |
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Most Influential reactions involving O4 (g, C2h singlet)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 | | 0.122 | 5735.5 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.32 ± 0.75 kcal/mol | Ruscic W1RO | | 0.114 | 5739.2 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D3h singlet) | ΔrH°(0 K) = 19.71 ± 0.80 kcal/mol | Ruscic G4 | | 0.109 | 5738.2 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D2d singlet) | ΔrH°(0 K) = 15.85 ± 0.80 kcal/mol | Ruscic G4 | | 0.107 | 5735.2 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.44 ± 0.80 kcal/mol | Ruscic G4 | | 0.107 | 5735.4 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.74 ± 0.80 kcal/mol | Ruscic CBS-n | | 0.105 | 5737.5 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 3.01 ± 0.75 kcal/mol | Ruscic W1RO | | 0.098 | 5739.1 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D3h singlet) | ΔrH°(0 K) = 19.92 ± 0.86 kcal/mol | Ruscic G3X | | 0.096 | 5738.4 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D2d singlet) | ΔrH°(0 K) = 14.28 ± 0.80 (×1.067) kcal/mol | Ruscic CBS-n | | 0.093 | 5735.1 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 4.06 ± 0.86 kcal/mol | Ruscic G3X | | 0.092 | 5737.2 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 1.78 ± 0.80 kcal/mol | Ruscic G4 | | 0.092 | 5737.4 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 2.82 ± 0.80 kcal/mol | Ruscic CBS-n | | 0.084 | 5739.4 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D3h singlet) | ΔrH°(0 K) = 18.18 ± 0.80 (×1.164) kcal/mol | Ruscic CBS-n | | 0.074 | 5732.2 | 1/2 O2 (g) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 7.91 ± 0.80 (×1.022) kcal/mol | Ruscic G4 | | 0.067 | 5732.1 | 1/2 O2 (g) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 7.89 ± 0.86 kcal/mol | Ruscic G3X | | 0.062 | 5739.3 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D3h singlet) | ΔrH°(0 K) = 18.74 ± 1.08 kcal/mol | Ruscic CBS-n | | 0.060 | 5738.3 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D2d singlet) | ΔrH°(0 K) = 14.31 ± 1.08 kcal/mol | Ruscic CBS-n | | 0.060 | 5732.4 | 1/2 O2 (g) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 9.61 ± 0.80 (×1.139) kcal/mol | Ruscic CBS-n | | 0.059 | 5735.3 | 1/4 O4 (g, D2h singlet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 5.07 ± 1.08 kcal/mol | Ruscic CBS-n | | 0.054 | 5738.1 | 1/4 O4 (g, C2h singlet) → 1/4 O4 (g, D2d singlet) | ΔrH°(0 K) = 16.25 ± 0.86 (×1.325) kcal/mol | Ruscic G3X | | 0.050 | 5737.3 | 1/4 O4 (g, C2h triplet) → 1/4 O4 (g, C2h singlet) | ΔrH°(0 K) = 3.18 ± 1.08 kcal/mol | Ruscic CBS-n |
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References
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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. 1.122p of the Thermochemical Network (2020); available at ATcT.anl.gov |
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4
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P. B. Changala, T. L. Nguyen, J. H. Baraban, G. B. Ellison, J. F. Stanton, D. H. Bross, and B. Ruscic,
Active Thermochemical Tables: The Adiabatic Ionization Energy of Hydrogen Peroxide.
J. Phys. Chem. A 121, 8799-8806 (2017)
[DOI: 10.1021/acs.jpca.7b06221] (highlighted on the journal cover)
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5
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D. Feller, D. H. Bross, and B. Ruscic,
Enthalpy of Formation of N2H4 (Hydrazine) Revisited.
J. Phys. Chem. A 121, 6187-6198 (2017)
[DOI: 10.1021/acs.jpca.7b06017]
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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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