Selected ATcT [1, 2] enthalpy of formation based on version 1.122r of the Thermochemical Network [3] This version of ATcT results was generated from an expansion of version 1.122q [4, 5] to include a non-rigid rotor anharmonic oscillator (NRRAO) partition function for hydroxymethyl [6], as well as data on 42 additional species, some of which are related to soot formation mechanisms.
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Species Name |
Formula |
Image |
ΔfH°(0 K) |
ΔfH°(298.15 K) |
Uncertainty |
Units |
Relative Molecular Mass |
ATcT ID |
Hydroxymethylene anion | [HCOH]- (g, gauche quartet) | | 334.0 | 334.8 | ± 2.1 | kJ/mol | 30.02653 ± 0.00087 | 207914-87-2*3 |
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Representative Geometry of [HCOH]- (g, gauche quartet) |
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spin ON spin OFF |
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Top contributors to the provenance of ΔfH° of [HCOH]- (g, gauche quartet)The 9 contributors listed below account for 77.6% of the provenance of ΔfH° of [HCOH]- (g, gauche quartet).
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 | 14.5 | 2578.6 | [HCOH]- (g, gauche quartet) → HCOH (g, gauche triplet)  | ΔrH°(0 K) = -1.185 ± 0.050 eV | Ruscic W1RO | 10.7 | 2584.6 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 253.13 ± 1.50 kcal/mol | Ruscic W1RO | 9.7 | 2578.4 | [HCOH]- (g, gauche quartet) → HCOH (g, gauche triplet)  | ΔrH°(0 K) = -1.202 ± 0.061 eV | Ruscic G4 | 9.4 | 2584.4 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 252.42 ± 1.60 kcal/mol | Ruscic G4 | 8.1 | 2584.3 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 252.77 ± 1.72 kcal/mol | Ruscic G3X | 7.6 | 2595.6 | [HCOH]- (g, trans) → [HCOH]- (g, gauche quartet)  | ΔrH°(0 K) = 15492 ± 500 cm-1 | Ruscic W1RO | 6.8 | 2595.4 | [HCOH]- (g, trans) → [HCOH]- (g, gauche quartet)  | ΔrH°(0 K) = 15834 ± 525 cm-1 | Ruscic G4 | 5.2 | 2595.3 | [HCOH]- (g, trans) → [HCOH]- (g, gauche quartet)  | ΔrH°(0 K) = 15469 ± 600 cm-1 | Ruscic G3X | 5.1 | 2584.5 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 251.89 ± 2.16 kcal/mol | Ruscic CBS-n |
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Top 10 species with enthalpies of formation correlated to the ΔfH° of [HCOH]- (g, gauche quartet) |
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 | 25.8 | Hydroxymethylene anion | [HCOH]- (g, trans) | | 147.1 | 144.1 | ± 1.6 | kJ/mol | 30.02653 ± 0.00087 | 207914-87-2*1 | 25.8 | Hydroxymethylene anion | [HCOH]- (g) | | 147.1 | 144.2 | ± 1.6 | kJ/mol | 30.02653 ± 0.00087 | 207914-87-2*0 | 20.7 | Hydroxymethylene | HCOH (g, gauche triplet) | | 219.3 | 216.4 | ± 1.1 | kJ/mol | 30.02598 ± 0.00087 | 19710-56-6*3 | 15.4 | Hydroxymethylene anion | [HCOH]- (g, cis) | | 160.2 | 157.5 | ± 1.7 | kJ/mol | 30.02653 ± 0.00087 | 207914-87-2*2 | 4.9 | Hydroxymethylene cation | [HCOH]+ (g, gauche quartet) | | 1482.1 | 1479.4 | ± 1.9 | kJ/mol | 30.02543 ± 0.00087 | 135395-06-1*3 | 4.3 | Aquacarbon | H2OC (g, triplet) | | 442.7 | 441.1 | ± 1.3 | kJ/mol | 30.02598 ± 0.00087 | 81434-73-3*1 | 3.4 | Hydroxymethylene | HCOH (g, trans) | | 112.68 | 108.91 | ± 0.27 | kJ/mol | 30.02598 ± 0.00087 | 19710-56-6*1 | 3.4 | Hydroxymethylene | HCOH (g) | | 112.68 | 108.92 | ± 0.27 | kJ/mol | 30.02598 ± 0.00087 | 19710-56-6*0 | 2.9 | Hydroxymethylene | HCOH (g, cis) | | 131.10 | 127.36 | ± 0.29 | kJ/mol | 30.02598 ± 0.00087 | 19710-56-6*2 | 1.7 | Carbon | C (g) | | 711.398 | 716.883 | ± 0.045 | kJ/mol | 12.01070 ± 0.00080 | 7440-44-0*0 |
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Most Influential reactions involving [HCOH]- (g, gauche quartet)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 | 0.190 | 2578.6 | [HCOH]- (g, gauche quartet) → HCOH (g, gauche triplet)  | ΔrH°(0 K) = -1.185 ± 0.050 eV | Ruscic W1RO | 0.141 | 2595.6 | [HCOH]- (g, trans) → [HCOH]- (g, gauche quartet)  | ΔrH°(0 K) = 15492 ± 500 cm-1 | Ruscic W1RO | 0.128 | 2578.4 | [HCOH]- (g, gauche quartet) → HCOH (g, gauche triplet)  | ΔrH°(0 K) = -1.202 ± 0.061 eV | Ruscic G4 | 0.127 | 2595.4 | [HCOH]- (g, trans) → [HCOH]- (g, gauche quartet)  | ΔrH°(0 K) = 15834 ± 525 cm-1 | Ruscic G4 | 0.107 | 2584.6 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 253.13 ± 1.50 kcal/mol | Ruscic W1RO | 0.097 | 2595.3 | [HCOH]- (g, trans) → [HCOH]- (g, gauche quartet)  | ΔrH°(0 K) = 15469 ± 600 cm-1 | Ruscic G3X | 0.094 | 2584.4 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 252.42 ± 1.60 kcal/mol | Ruscic G4 | 0.081 | 2584.3 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 252.77 ± 1.72 kcal/mol | Ruscic G3X | 0.066 | 2578.3 | [HCOH]- (g, gauche quartet) → HCOH (g, gauche triplet)  | ΔrH°(0 K) = -1.199 ± 0.085 eV | Ruscic G3X | 0.061 | 2595.5 | [HCOH]- (g, trans) → [HCOH]- (g, gauche quartet)  | ΔrH°(0 K) = 15662 ± 755 cm-1 | Ruscic CBS-n | 0.056 | 2578.5 | [HCOH]- (g, gauche quartet) → HCOH (g, gauche triplet)  | ΔrH°(0 K) = -1.211 ± 0.092 eV | Ruscic CBS-n | 0.051 | 2584.5 | [HCOH]- (g, gauche quartet) → C (g) + O (g) + 2 H (g)  | ΔrH°(0 K) = 251.89 ± 2.16 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. 1.122r of the Thermochemical Network, Argonne National Laboratory, Lemont, Illinois 2021 [DOI: 10.17038/CSE/1822363]; available at ATcT.anl.gov
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4
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D. Feller, D. H. Bross, and B. Ruscic,
Enthalpy of Formation of C2H2O4 (Oxalic Acid) from High-Level Calculations and the Active Thermochemical Tables Approach.
J. Phys. Chem. A 123, 3481-3496 (2019)
[DOI: 10.1021/acs.jpca.8b12329]
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5
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B. K. Welch, R. Dawes, D. H. Bross, and B. Ruscic,
An Automated Thermochemistry Protocol Based on Explicitly Correlated Coupled-Cluster Theory: The Methyl and Ethyl Peroxy Families.
J. Phys. Chem. A 123, 5673-5682 (2019)
[DOI: 10.1021/acs.jpca.8b12329]
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6
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D. H. Bross, H.-G. Yu, L. B. Harding, and B. Ruscic,
Active Thermochemical Tables: The Partition Function of Hydroxymethyl (CH2OH) Revisited.
J. Phys. Chem. A 123, 4212-4231 (2019)
[DOI: 10.1021/acs.jpca.9b02295]
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7
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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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