Selected ATcT [1, 2] enthalpy of formation based on version 1.156 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.148 to include species relevant to a recent study of the oxidation of ethylene [4] as well as new measurements that led to refining the thermochemistry of CF and SiF and their cations [5].

Fluoroform

Formula: CHF3 (g)

CAS RN: 75-46-7

ATcT ID: 75-46-7*0

SMILES: C(F)(F)F

InChI: InChI=1S/CHF3/c2-1(3)4/h1H

InChIKey: XPDWGBQVDMORPB-UHFFFAOYSA-N

Hills Formula: C1H1F3

2D Image:

Aliases: CHF3; Fluoroform; Trifluoromethane; Methane trifluoride; Carbon trifluoride; Fluoryl; Methyl trifluoride; Methenyl trichloride; Trifluorocarbon; UN 1984; R 23; Halocarbon 23; Freon 23; Freon F-23; FC 23; HFC 23; HCFC 23; Genetron 23; Arcton 1; Arcton

Relative Molecular Mass: 70.01385 ± 0.00080

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
-689.28	-696.23	± 0.40	kJ/mol

3D Image of CHF3 (g)

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Top contributors to the provenance of Δ_fH° of CHF3 (g)

The 20 contributors listed below account only for 53.5% of the provenance of Δ_fH° of CHF3 (g).
A total of 105 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
7.0	6238.8	CHF3 (g) → C (g) + 3 F (g) + H (g)	Δ_rH°(0 K) = 441.98 ± 0.35 kcal/mol	Karton 2017
5.9	6377.7	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -7.5 ± 2.5 kJ/mol	Klopper 2010a, est unc
4.1	6260.1	CHF3 (g) + I2 (g) → CF3I (g) + HI (g)	Δ_rH°(298.15 K) = 17.10 ± 0.34 kcal/mol	Goy 1967, as quoted by Cox 1970
3.8	6239.1	CHF3 (g) → C (g) + 3/2 F2 (g) + 1/2 H2 (g)	Δ_rH°(0 K) = 1399.39 ± 2.0 kJ/mol	Csontos 2010
2.8	6241.4	CHF3 (g) + F (g) → CF4 (g) + H (g)	Δ_rH°(0 K) = -101.36 ± 2.0 kJ/mol	Csontos 2010
2.8	6256.3	CHF3 (g) + Br2 (g) → CF3Br (g) + HBr (g)	Δ_rH°(298.15 K) = -4.59 ± 0.25 (×1.682) kcal/mol	Coomber 1967, as quoted by Cox 1970
2.8	6376.7	CH3F (g) + CF4 (g) → CH2F2 (g) + CHF3 (g)	Δ_rH°(0 K) = 22.4 ± 2.5 kJ/mol	Klopper 2010a, est unc
2.6	6377.6	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -2.05 ± 0.9 kcal/mol	Ruscic W1RO
2.2	6243.8	CHF3 (g) + CH3F (g) → CH4 (g) + CF4 (g)	Δ_rH°(0 K) = -77.9 ± 2.5 kJ/mol	Klopper 2010a, est unc
2.1	6377.4	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -1.90 ± 1.0 kcal/mol	Ruscic G4
2.0	6240.4	CHF3 (g) + 2 H (g) → CH3F (g) + 2 F (g)	Δ_rH°(0 K) = 181.83 ± 2.0 (×1.242) kJ/mol	Csontos 2010
1.9	6242.1	2 CHF3 (g) + O2 (g) + 2 H2O (cr,l) → 2 CO2 (g) + 6 HF (aq, 22 H2O)	Δ_rH°(298.15 K) = -180.66 ± 1.30 kcal/mol	Neugebauer 1958, as quoted by Cox 1970
1.8	6241.5	CHF3 (g) + F (g) → CF4 (g) + H (g)	Δ_rH°(0 K) = -101.4 ± 2.5 kJ/mol	Klopper 2010a, est unc
1.8	6299.6	CH2F2 (g) + F (g) → CHF3 (g) + H (g)	Δ_rH°(0 K) = -106.45 ± 2.0 kJ/mol	Csontos 2010
1.7	6425.1	CHF3 (g) + Br (g) → CF3 (g) + HBr (g)	Δ_rH°(298.15 K) = 18.89 ± 0.5 (×1.091) kcal/mol	Syverud 1969, Arthur 1969, Amphlett 1968
1.7	6377.3	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -1.98 ± 1.1 kcal/mol	Ruscic G3X
1.6	6238.11	CHF3 (g) → C (g) + 3 F (g) + H (g)	Δ_rH°(0 K) = 1851.2 ± 3.0 kJ/mol	Klopper 2010a
1.4	6433.1	CHF3 (g) + H (g) → CF3 (g) + H2 (g)	Δ_rH°(298.15 K) = 2.09 ± 0.6 kcal/mol	Ruscic 1998, Hranisavljevic 1998a
1.4	6256.1	CHF3 (g) + Br2 (g) → CF3Br (g) + HBr (g)	Δ_rH°(750 K) = -4.2 ± 0.6 kcal/mol	Corbett 1962
1.2	6377.5	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -1.97 ± 1.3 kcal/mol	Ruscic CBS-n

Top 10 species with enthalpies of formation correlated to the Δ_fH° of CHF3 (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
94.2	Fluoroform	CHF3 (l)		-704.70	± 0.42	kJ/mol	70.01385 ± 0.00080	75-46-7*590
36.3	Difluoromethane	CH2F2 (g)	-443.32	-450.93	± 0.35	kJ/mol	52.02339 ± 0.00081	75-10-5*0
34.0	Difluoromethane	CH2F2 (l)		-468.91	± 0.37	kJ/mol	52.02339 ± 0.00081	75-10-5*590
26.1	Difluorobromomethane	CHF2Br (g)	-411.39	-424.59	± 0.47	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
25.9	Tetrafluoromethane	CF4 (g)	-927.62	-933.59	± 0.23	kJ/mol	88.00431 ± 0.00080	75-73-0*0
24.8	Bromotrifluoromethane	CF3Br (g)	-638.79	-650.91	± 0.39	kJ/mol	148.9099 ± 0.0013	75-63-8*0
23.7	Iodotrifluoromethane	CF3I (g)	-583.38	-589.26	± 0.45	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
22.0	Trifluoromethylium	[CF3]+ (g)	409.61	406.40	± 0.41	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
21.5	Trifluoromethyl	CF3 (g)	-464.92	-467.71	± 0.43	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
21.3	Polytetrafluoroethylene	CF2CF2 (s)		-829.92	± 0.54	kJ/mol	100.0150 ± 0.0016	9002-84-0*591

Most Influential reactions involving CHF3 (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
0.999	6245.1	CHF3 (l) → CHF3 (g)	Δ_rH°(188.75 K) = 16.80 ± 0.14 kJ/mol	ThermoData 2004
0.133	6260.1	CHF3 (g) + I2 (g) → CF3I (g) + HI (g)	Δ_rH°(298.15 K) = 17.10 ± 0.34 kcal/mol	Goy 1967, as quoted by Cox 1970
0.109	6302.6	2 CH2F2 (g) → CH3F (g) + CHF3 (g)	Δ_rH°(0 K) = -31.06 ± 2.0 kJ/mol	Csontos 2010
0.109	6348.3	CHClF2 (g) + F (g) → CHF3 (g) + Cl (g)	Δ_rH°(0 K) = -168.79 ± 3.1 kJ/mol	Csontos 2010
0.085	6377.7	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -7.5 ± 2.5 kJ/mol	Klopper 2010a, est unc
0.082	299.1	[CF3]- (g) + HOOH (g) → [HOO]- (g) + CHF3 (g)	Δ_rG°(298.15 K) = -3.1 ± 1.8 (×3.437) kJ/mol	Bierbaum 1981, note unc4
0.076	6256.3	CHF3 (g) + Br2 (g) → CF3Br (g) + HBr (g)	Δ_rH°(298.15 K) = -4.59 ± 0.25 (×1.682) kcal/mol	Coomber 1967, as quoted by Cox 1970
0.072	6238.8	CHF3 (g) → C (g) + 3 F (g) + H (g)	Δ_rH°(0 K) = 441.98 ± 0.35 kcal/mol	Karton 2017
0.070	6302.7	2 CH2F2 (g) → CH3F (g) + CHF3 (g)	Δ_rH°(0 K) = -29.9 ± 2.5 kJ/mol	Klopper 2010a, est unc
0.055	6376.7	CH3F (g) + CF4 (g) → CH2F2 (g) + CHF3 (g)	Δ_rH°(0 K) = 22.4 ± 2.5 kJ/mol	Klopper 2010a, est unc
0.052	6425.1	CHF3 (g) + Br (g) → CF3 (g) + HBr (g)	Δ_rH°(298.15 K) = 18.89 ± 0.5 (×1.091) kcal/mol	Syverud 1969, Arthur 1969, Amphlett 1968
0.044	6299.6	CH2F2 (g) + F (g) → CHF3 (g) + H (g)	Δ_rH°(0 K) = -106.45 ± 2.0 kJ/mol	Csontos 2010
0.041	6249.5	CF3Cl (g) + H (g) → CHF3 (g) + Cl (g)	Δ_rH°(0 K) = -79.75 ± 3.1 kJ/mol	Csontos 2010
0.041	6433.1	CHF3 (g) + H (g) → CF3 (g) + H2 (g)	Δ_rH°(298.15 K) = 2.09 ± 0.6 kcal/mol	Ruscic 1998, Hranisavljevic 1998a
0.040	6241.4	CHF3 (g) + F (g) → CF4 (g) + H (g)	Δ_rH°(0 K) = -101.36 ± 2.0 kJ/mol	Csontos 2010
0.039	6239.1	CHF3 (g) → C (g) + 3/2 F2 (g) + 1/2 H2 (g)	Δ_rH°(0 K) = 1399.39 ± 2.0 kJ/mol	Csontos 2010
0.038	6408.7	3 CH3F (g) → CHF3 (g) + 2 CH4 (g)	Δ_rH°(0 K) = -33.23 ± 0.9 kcal/mol	Ruscic W1RO
0.037	6374.9	CHF3 (g) + CH4 (g) → CH2F2 (g) + CH3F (g)	Δ_rH°(0 K) = 85.4 ± 2.5 kJ/mol	Klopper 2010a, est unc
0.037	6377.6	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -2.05 ± 0.9 kcal/mol	Ruscic W1RO
0.037	6256.1	CHF3 (g) + Br2 (g) → CF3Br (g) + HBr (g)	Δ_rH°(750 K) = -4.2 ± 0.6 kcal/mol	Corbett 1962

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. 1.156 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		N. A. Seifert, B. Ruscic, R. Sivaramakrishnan, and K. Prozument, The C2H4O Isomers in the Oxidation of Ethylene J. Mol. Spectrosc. 398, 111847/1-8 (2023) [DOI: 10.1016/j.jms.2023.111847]
5		U. Jacovella, B. Ruscic, N. L. Chen, H.-L. Le, S. Boyé-Péronne, S. Hartweg, M. Roy-Chowdhury, G. A. Garcia, J.-C. Loison, and B. Gans, Refining Thermochemical Properties of CF, SiF, and Their Cations by Combining Photoelectron Spectroscopy, Quantum Chemical Calculations, and the Active Thermochemical Tables Approach Phys. Chem. Chem. Phys. 25, 30838-30847 (2023) [DOI: 10.1039/D3CP04244H]
6		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]
7		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 [6] and Ruscic and Bross[7]).
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.