Selected ATcT [1, 2] enthalpy of formation based on version 1.176 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.172 to include species related to Criegee intermediates that are involved in several ongoing studies[4].

Peroxyformic acid

Formula: HC(O)OOH (g, cis)

CAS RN: 107-32-4

ATcT ID: 107-32-4*1

SMILES: C(=O)OO

InChI: InChI=1S/CH2O3/c2-1-4-3/h1,3H

InChIKey: SCKXCAADGDQQCS-UHFFFAOYSA-N

Hills Formula: C1H2O3

2D Image:

Aliases: HC(O)OOH; Peroxyformic acid; Methaneperoxoic acid; Formyl hydroperoxide; Performic acid; Permethanoic acid; DEX 135; Desinfix 135; TM Formodez; OCHOOH

Relative Molecular Mass: 62.0248 ± 0.0012

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
-279.23	-288.58	± 0.63	kJ/mol

3D Image of HC(O)OOH (g, cis)

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Top contributors to the provenance of Δ_fH° of HC(O)OOH (g, cis)

The 20 contributors listed below account only for 66.7% of the provenance of Δ_fH° of HC(O)OOH (g, cis).
A total of 63 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.

Contribution (%)	TN ID	Reaction	Measured Quantity	Reference
9.7	3145.1	CH4 (g) + 3 H2O (g) → HC(O)OOH (g, cis) + 4 H2 (g)	Δ_rH°(0 K) = 504.10 ± 2.0 kJ/mol	Klippenstein 2017
8.7	3147.6	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 17.86 ± 2.0 kJ/mol	Klippenstein 2017
7.0	3146.7	HC(O)OOH (g, cis) → C(O)(OH)2 (g, cis-cis)	Δ_rH°(0 K) = -322.97 ± 2.0 kJ/mol	Klippenstein 2017
6.6	3149.6	HC(O)OOH (g, cis) + CH4 (g) → CH3OOH (g) + CH2O (g)	Δ_rH°(0 K) = 125.37 ± 2.0 kJ/mol	Klippenstein 2017
5.9	3187.6	HC(O)OOH (g, cis) → HC(O)OO (g, syn) + H (g)	Δ_rH°(0 K) = 395.01 ± 2.0 kJ/mol	Klippenstein 2017
5.9	3148.6	HC(O)OOH (g, cis) + CH3OH (g) → HC(O)OH (g, syn) + CH3OOH (g)	Δ_rH°(0 K) = -16.39 ± 2.0 kJ/mol	Klippenstein 2017
2.4	3147.5	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 4.29 ± 0.9 kcal/mol	Ruscic W1RO
2.0	3147.4	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 4.81 ± 1.0 kcal/mol	Ruscic CBS-n
2.0	3147.2	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 4.12 ± 1.0 kcal/mol	Ruscic G4
1.8	3149.5	HC(O)OOH (g, cis) + CH4 (g) → CH3OOH (g) + CH2O (g)	Δ_rH°(0 K) = 29.87 ± 0.9 kcal/mol	Ruscic W1RO
1.6	3148.5	HC(O)OOH (g, cis) + CH3OH (g) → HC(O)OH (g, syn) + CH3OOH (g)	Δ_rH°(0 K) = -3.84 ± 0.9 kcal/mol	Ruscic W1RO
1.6	3147.1	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 4.18 ± 1.1 kcal/mol	Ruscic G3X
1.6	3188.5	HC(O)OOH (g, cis) → [HC(O)OO]- (g, syn) + H+ (g)	Δ_rH°(0 K) = 350.92 ± 0.90 kcal/mol	Ruscic W1RO
1.5	3149.2	HC(O)OOH (g, cis) + CH4 (g) → CH3OOH (g) + CH2O (g)	Δ_rH°(0 K) = 29.19 ± 1.0 kcal/mol	Ruscic G4
1.5	3149.4	HC(O)OOH (g, cis) + CH4 (g) → CH3OOH (g) + CH2O (g)	Δ_rH°(0 K) = 30.58 ± 1.0 kcal/mol	Ruscic CBS-n
1.3	3148.4	HC(O)OOH (g, cis) + CH3OH (g) → HC(O)OH (g, syn) + CH3OOH (g)	Δ_rH°(0 K) = -3.60 ± 1.0 kcal/mol	Ruscic CBS-n
1.3	3148.2	HC(O)OOH (g, cis) + CH3OH (g) → HC(O)OH (g, syn) + CH3OOH (g)	Δ_rH°(0 K) = -4.28 ± 1.0 kcal/mol	Ruscic G4
1.2	3149.1	HC(O)OOH (g, cis) + CH4 (g) → CH3OOH (g) + CH2O (g)	Δ_rH°(0 K) = 29.45 ± 1.1 kcal/mol	Ruscic G3X
1.1	3147.3	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 4.16 ± 1.3 kcal/mol	Ruscic CBS-n
1.1	4528.9	CH3OOH (g) → C (g) + 4 H (g) + 2 O (g)	Δ_rH°(0 K) = 2184.34 ± 1. kJ/mol	Welch 2019, Welch 2018

Top 10 species with enthalpies of formation correlated to the Δ_fH° of HC(O)OOH (g, cis)

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.

Correlation Coefficent (%)	Species Name	Formula	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
100.0	Peroxyformic acid	HC(O)OOH (g)	-279.23	-288.37	± 0.63	kJ/mol	62.0248 ± 0.0012	107-32-4*0
35.4	Peroxyformic acid	HC(O)OOH (g, gauche)	-265.2	-273.1	± 1.4	kJ/mol	62.0248 ± 0.0012	107-32-4*3
33.4	Peroxyformic acid	HC(O)OOH (g, trans)	-265.2	-273.2	± 1.5	kJ/mol	62.0248 ± 0.0012	107-32-4*2
25.8	Methyl hydroperoxide	CH3OOH (g)	-114.82	-127.64	± 0.42	kJ/mol	48.0413 ± 0.0010	3031-73-0*0
20.7	Peroxyformyl	HC(O)OO (g)	-100.42	-105.53	± 0.67	kJ/mol	61.0168 ± 0.0012	56240-83-6*0
20.7	Peroxyformyl	HC(O)OO (g, syn)	-100.42	-105.73	± 0.67	kJ/mol	61.0168 ± 0.0012	56240-83-6*1
18.5	Peroxyformate	[HC(O)OO]- (g, syn)	-340.95	-346.40	± 0.80	kJ/mol	61.0174 ± 0.0012	104960-05-6*1
18.5	Peroxyformate	[HC(O)OO]- (g)	-340.95	-346.40	± 0.80	kJ/mol	61.0174 ± 0.0012	104960-05-6*0
18.0	Carbonic acid	C(O)(OH)2 (g, cis-cis)	-602.29	-612.46	± 0.55	kJ/mol	62.0248 ± 0.0012	463-79-6*1
18.0	Carbonic acid	C(O)(OH)2 (g)	-602.29	-611.60	± 0.55	kJ/mol	62.0248 ± 0.0012	463-79-6*0

Most Influential reactions involving HC(O)OOH (g, cis)

Please note: The list, which is based on a hat (projection) matrix analysis, is limited to no more than 20 largest influences.

Influence Coefficient	TN ID	Reaction	Measured Quantity	Reference
1.000	3159.1	HC(O)OOH (g) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = 0 ± 0 cm-1	Ruscic W1RO, Ruscic G4, Ruscic CBS-n
0.166	3187.6	HC(O)OOH (g, cis) → HC(O)OO (g, syn) + H (g)	Δ_rH°(0 K) = 395.01 ± 2.0 kJ/mol	Klippenstein 2017
0.150	3151.4	HC(O)OOH (g, trans) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.65 ± 0.85 kcal/mol	Ruscic W1RO
0.142	3146.7	HC(O)OOH (g, cis) → C(O)(OH)2 (g, cis-cis)	Δ_rH°(0 K) = -322.97 ± 2.0 kJ/mol	Klippenstein 2017
0.133	3151.1	HC(O)OOH (g, trans) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.21 ± 0.90 kcal/mol	Ruscic G3X
0.133	3151.2	HC(O)OOH (g, trans) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.12 ± 0.90 kcal/mol	Ruscic G4
0.132	3155.5	HC(O)OOH (g, gauche) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.65 ± 0.85 kcal/mol	Ruscic W1RO
0.118	3155.4	HC(O)OOH (g, gauche) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.76 ± 0.90 kcal/mol	Ruscic CBS-n
0.118	3155.2	HC(O)OOH (g, gauche) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.29 ± 0.90 kcal/mol	Ruscic G4
0.118	3155.1	HC(O)OOH (g, gauche) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.19 ± 0.90 kcal/mol	Ruscic G3X
0.110	3148.6	HC(O)OOH (g, cis) + CH3OH (g) → HC(O)OH (g, syn) + CH3OOH (g)	Δ_rH°(0 K) = -16.39 ± 2.0 kJ/mol	Klippenstein 2017
0.109	3149.6	HC(O)OOH (g, cis) + CH4 (g) → CH3OOH (g) + CH2O (g)	Δ_rH°(0 K) = 125.37 ± 2.0 kJ/mol	Klippenstein 2017
0.108	3151.3	HC(O)OOH (g, trans) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.42 ± 1.0 kcal/mol	Ruscic CBS-n
0.099	3145.1	CH4 (g) + 3 H2O (g) → HC(O)OOH (g, cis) + 4 H2 (g)	Δ_rH°(0 K) = 504.10 ± 2.0 kJ/mol	Klippenstein 2017
0.098	3147.6	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 17.86 ± 2.0 kJ/mol	Klippenstein 2017
0.095	3155.3	HC(O)OOH (g, gauche) → HC(O)OOH (g, cis)	Δ_rH°(0 K) = -3.24 ± 1.0 kcal/mol	Ruscic CBS-n
0.059	3188.5	HC(O)OOH (g, cis) → [HC(O)OO]- (g, syn) + H+ (g)	Δ_rH°(0 K) = 350.92 ± 0.90 kcal/mol	Ruscic W1RO
0.031	3148.5	HC(O)OOH (g, cis) + CH3OH (g) → HC(O)OH (g, syn) + CH3OOH (g)	Δ_rH°(0 K) = -3.84 ± 0.9 kcal/mol	Ruscic W1RO
0.030	3149.5	HC(O)OOH (g, cis) + CH4 (g) → CH3OOH (g) + CH2O (g)	Δ_rH°(0 K) = 29.87 ± 0.9 kcal/mol	Ruscic W1RO
0.027	3147.5	HC(O)OOH (g, cis) + H2O (g) → HC(O)OH (g, syn) + HOOH (g)	Δ_rH°(0 K) = 4.29 ± 0.9 kcal/mol	Ruscic W1RO

References

1		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]
2		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 21^st Century. J. Phys. Conf. Ser. 16, 561-570 (2005) [DOI: 10.1088/1742-6596/16/1/078]
3		B. Ruscic and D. H. Bross, Active Thermochemical Tables (ATcT) values based on ver. 1.176 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		T. L. Nguyen et al, ongoing studies (2024)
5		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]
6		B. Ruscic and D. H. Bross, Thermochemistry Computer Aided Chem. Eng. 45, 3-114 (2019) [DOI: 10.1016/B978-0-444-64087-1.00001-2]

Formula

The aggregate state is given in parentheses following the formula, such as: g - gas-phase, cr - crystal, l - liquid, etc.

Uncertainties

The listed uncertainties correspond to estimated 95% confidence limits, as customary in thermochemistry (see, for example, Ruscic [5] and Ruscic and Bross[6]).
Note that an uncertainty of ± 0.000 kJ/mol indicates that the estimated uncertainty is < ± 0.000₅ kJ/mol.

Website Functionality Credits

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/.

Acknowledgement

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.