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].

Fluorine atom

Formula: F (g)

CAS RN: 14762-94-8

ATcT ID: 14762-94-8*0

SMILES: [F]

InChI: InChI=1S/F

InChIKey: YCKRFDGAMUMZLT-UHFFFAOYSA-N

Hills Formula: F1

2D Image:

Aliases: F; Fluorine atom; Fluorine; Atomic fluorine; Fluorine radical; Monofluorine; Fluoranyl; F-atom

Relative Molecular Mass: 18.99840320 ± 0.00000050

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
77.254	79.360	± 0.017	kJ/mol

3D Image of F (g)

spin ON spin OFF

Top contributors to the provenance of Δ_fH° of F (g)

The 4 contributors listed below account for 90.2% of the provenance of Δ_fH° of F (g).

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
57.1	461.1	F2 (g) → F+ (g) + F- (g)	Δ_rH°(0 K) = 15.62294 ± 0.00043 eV	Matthiasson 2021
29.3	462.1	F2 (g) → F+ (g) + F (g)	Δ_rH°(0 K) = 19.0242 ± 0.0006 eV	Matthiasson 2021
2.3	438.1	F2 (g) → 2 F (g)	Δ_rH°(0 K) = 36.91 ± 0.05 kcal/mol	Feller 2014
1.3	447.1	F (g) → F+ (g)	Δ_rH°(0 K) = 140524.5 ± 0.4 cm-1	Liden 1949, Moore 1970

Top 10 species with enthalpies of formation correlated to the Δ_fH° of F (g)

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	Fluorine atom	F (g, 2P3/2)	77.254	79.039	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*1
100.0	Fluorine atom	F (g, 2P1/2)	82.088	83.873	± 0.017	kJ/mol	18.99840320 ± 0.00000050	14762-94-8*2
99.9	Fluoride	F- (g)	-250.911	-249.126	± 0.017	kJ/mol	18.99895178 ± 0.00000050	16984-48-8*0
96.1	Fluorine atom cation	F+ (g)	1758.301	1760.600	± 0.017	kJ/mol	18.99785462 ± 0.00000050	14701-13-4*0
89.6	Hydrogen fluoride	HF (g)	-272.679	-272.726	± 0.018	kJ/mol	20.006343 ± 0.000070	7664-39-3*0
77.0	Fluorine atom dication	[F]+2 (g)	5132.472	5134.257	± 0.021	kJ/mol	18.99730604 ± 0.00000050	14701-07-6*0
74.4	Fluoroniumyl ion	[HF]+ (g)	1275.556	1275.788	± 0.022	kJ/mol	20.005795 ± 0.000070	12381-92-9*0
52.4	Chlorine fluoride	ClF (g)	-55.622	-55.717	± 0.030	kJ/mol	54.45110 ± 0.00090	7790-89-8*0
49.4	Fluorine atom trication	[F]+3 (g)	11182.872	11186.697	± 0.032	kJ/mol	18.99675746 ± 0.00000050	14700-88-0*0
14.6	Tetrafluoromethane	CF4 (g)	-927.65	-933.62	± 0.23	kJ/mol	88.00431 ± 0.00080	75-73-0*0

Most Influential reactions involving F (g)

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	459.1	F (g) → F (g, 2P3/2)	Δ_rH°(0 K) = 0.00 ± 0.00 cm-1	triv
1.000	665.5	FFO (g, singlet) → 2 F (g) + O (g)	Δ_rH°(0 K) = 41.7 ± 5 kcal/mol	Ruscic W1RO, Ruscic CBS-n
0.871	447.1	F (g) → F+ (g)	Δ_rH°(0 K) = 140524.5 ± 0.4 cm-1	Liden 1949, Moore 1970
0.692	613.2	[FHF]+ (g, triplet ?) → [HF]+ (g) + F (g)	Δ_rH°(0 K) = 1.21 ± 0.2 eV	Ruscic MP2, est unc
0.633	448.2	F- (g) → F (g)	Δ_rH°(0 K) = 27432.446 ± 0.019 cm-1	Blondel 2001
0.630	691.7	OFO (g) → F (g) + 2 O (g)	Δ_rH°(0 K) = 11.2 ± 0.3 kcal/mol	Feller 2010
0.622	2165.1	NF3 (g) → [NF2]+ (g, singlet) + F (g)	Δ_rH°(0 K) = 14.100 ± 0.008 eV	Berkowitz 1984
0.536	6432.4	CH2FBr (g) → C (g) + 2 H (g) + F (g) + Br (g)	Δ_rH°(0 K) = 366.51 ± 1.60 kcal/mol	Ruscic G4
0.536	6462.4	CCl2FBr (g) → C (g) + 2 Cl (g) + F (g) + Br (g)	Δ_rH°(0 K) = 327.67 ± 1.60 kcal/mol	Ruscic G4
0.536	6455.4	CHFBr2 (g) → C (g) + 2 Br (g) + H (g) + F (g)	Δ_rH°(0 K) = 333.53 ± 1.60 kcal/mol	Ruscic G4
0.536	6460.4	CHFClBr (g) → C (g) + H (g) + F (g) + Cl (g) + Br (g)	Δ_rH°(0 K) = 348.46 ± 1.60 kcal/mol	Ruscic G4
0.536	6461.4	CF2ClBr (g) → C (g) + 2 F (g) + Cl (g) + Br (g)	Δ_rH°(0 K) = 365.48 ± 1.60 kcal/mol	Ruscic G4
0.536	6463.4	CBr2FCl (g) → C (g) + 2 Br (g) + F (g) + Cl (g)	Δ_rH°(0 K) = 312.84 ± 1.60 kcal/mol	Ruscic G4
0.500	2178.1	NF2 (g) → [NF]+ (g) + F (g)	Δ_rH°(0 K) = 15.090 ± 0.010 eV	Berkowitz 1984
0.463	6462.3	CCl2FBr (g) → C (g) + 2 Cl (g) + F (g) + Br (g)	Δ_rH°(0 K) = 329.29 ± 1.72 kcal/mol	Ruscic G3X
0.463	6432.3	CH2FBr (g) → C (g) + 2 H (g) + F (g) + Br (g)	Δ_rH°(0 K) = 367.81 ± 1.72 kcal/mol	Ruscic G3X
0.463	6455.3	CHFBr2 (g) → C (g) + 2 Br (g) + H (g) + F (g)	Δ_rH°(0 K) = 335.98 ± 1.72 kcal/mol	Ruscic G3X
0.463	6460.3	CHFClBr (g) → C (g) + H (g) + F (g) + Cl (g) + Br (g)	Δ_rH°(0 K) = 349.76 ± 1.72 kcal/mol	Ruscic G3X
0.463	6461.3	CF2ClBr (g) → C (g) + 2 F (g) + Cl (g) + Br (g)	Δ_rH°(0 K) = 367.12 ± 1.72 kcal/mol	Ruscic G3X
0.463	6463.3	CBr2FCl (g) → C (g) + 2 Br (g) + F (g) + Cl (g)	Δ_rH°(0 K) = 315.45 ± 1.72 kcal/mol	Ruscic G3X

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.