Selected ATcT [1, 2] enthalpy of formation based on version 1.172 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.156 to include species relevant to a study of photodissociation of formamide[4].

Fluoroform

Formula: CHF3 (l)

CAS RN: 75-46-7

ATcT ID: 75-46-7*590

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
	-704.71	± 0.42	kJ/mol

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

The 20 contributors listed below account only for 57.7% of the provenance of Δ_fH° of CHF3 (l).
A total of 99 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
11.2	6296.1	CHF3 (l) → CHF3 (g)	Δ_rH°(188.75 K) = 16.80 ± 0.14 kJ/mol	ThermoData 2004
6.2	6289.8	CHF3 (g) → C (g) + 3 F (g) + H (g)	Δ_rH°(0 K) = 441.98 ± 0.35 kcal/mol	Karton 2017
5.2	6429.7	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -7.5 ± 2.5 kJ/mol	Klopper 2010a, est unc
3.5	6311.1	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
3.3	6290.1	CHF3 (g) → C (g) + 3/2 F2 (g) + 1/2 H2 (g)	Δ_rH°(0 K) = 1399.39 ± 2.0 kJ/mol	Csontos 2010
3.0	6307.3	CHF3 (g) + Br2 (g) → CF3Br (g) + HBr (g)	Δ_rH°(298.15 K) = -4.59 ± 0.25 (×1.509) kcal/mol	Coomber 1967, as quoted by Cox 1970
2.5	6292.4	CHF3 (g) + F (g) → CF4 (g) + H (g)	Δ_rH°(0 K) = -101.36 ± 2.0 kJ/mol	Csontos 2010
2.4	6428.7	CH3F (g) + CF4 (g) → CH2F2 (g) + CHF3 (g)	Δ_rH°(0 K) = 22.4 ± 2.5 kJ/mol	Klopper 2010a, est unc
2.2	6429.6	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -2.05 ± 0.9 kcal/mol	Ruscic W1RO
1.9	6294.8	CHF3 (g) + CH3F (g) → CH4 (g) + CF4 (g)	Δ_rH°(0 K) = -77.9 ± 2.5 kJ/mol	Klopper 2010a, est unc
1.8	6429.4	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -1.90 ± 1.0 kcal/mol	Ruscic G4
1.7	6477.1	CHF3 (g) + Br (g) → CF3 (g) + HBr (g)	Δ_rH°(298.15 K) = 18.89 ± 0.5 kcal/mol	Syverud 1969, Arthur 1969, Amphlett 1968
1.7	6291.4	CHF3 (g) + 2 H (g) → CH3F (g) + 2 F (g)	Δ_rH°(0 K) = 181.83 ± 2.0 (×1.242) kJ/mol	Csontos 2010
1.7	6293.1	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
1.6	6292.5	CHF3 (g) + F (g) → CF4 (g) + H (g)	Δ_rH°(0 K) = -101.4 ± 2.5 kJ/mol	Klopper 2010a, est unc
1.6	6351.6	CH2F2 (g) + F (g) → CHF3 (g) + H (g)	Δ_rH°(0 K) = -106.45 ± 2.0 kJ/mol	Csontos 2010
1.5	6429.3	CH2F2 (g) + CF4 (g) → 2 CHF3 (g)	Δ_rH°(0 K) = -1.98 ± 1.1 kcal/mol	Ruscic G3X
1.4	6289.11	CHF3 (g) → C (g) + 3 F (g) + H (g)	Δ_rH°(0 K) = 1851.2 ± 3.0 kJ/mol	Klopper 2010a
1.2	6485.1	CHF3 (g) + H (g) → CF3 (g) + H2 (g)	Δ_rH°(298.15 K) = 2.09 ± 0.6 kcal/mol	Ruscic 1998, Hranisavljevic 1998a
1.1	6307.1	CHF3 (g) + Br2 (g) → CF3Br (g) + HBr (g)	Δ_rH°(750 K) = -4.2 ± 0.6 kcal/mol	Corbett 1962

Top 10 species with enthalpies of formation correlated to the Δ_fH° of CHF3 (l)

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 (g)	-689.29	-696.24	± 0.40	kJ/mol	70.01385 ± 0.00080	75-46-7*0
34.0	Difluoromethane	CH2F2 (g)	-443.33	-450.94	± 0.35	kJ/mol	52.02339 ± 0.00081	75-10-5*0
31.9	Difluoromethane	CH2F2 (l)		-468.92	± 0.37	kJ/mol	52.02339 ± 0.00081	75-10-5*590
24.4	Difluorobromomethane	CHF2Br (g)	-411.40	-424.60	± 0.47	kJ/mol	130.9194 ± 0.0013	1511-62-2*0
24.4	Tetrafluoromethane	CF4 (g)	-927.65	-933.61	± 0.23	kJ/mol	88.00431 ± 0.00080	75-73-0*0
24.4	Bromotrifluoromethane	CF3Br (g)	-638.64	-650.76	± 0.39	kJ/mol	148.9099 ± 0.0013	75-63-8*0
23.1	Iodotrifluoromethane	CF3I (g)	-583.20	-589.11	± 0.45	kJ/mol	195.91038 ± 0.00080	2314-97-8*0
22.0	Trifluoromethylium	[CF3]+ (g)	409.80	406.59	± 0.40	kJ/mol	69.00536 ± 0.00080	18851-76-8*0
21.4	Trifluoromethyl	CF3 (g)	-465.15	-467.95	± 0.42	kJ/mol	69.00591 ± 0.00080	2264-21-3*0
20.1	Polytetrafluoroethylene	CF2CF2 (s)		-829.96	± 0.54	kJ/mol	100.0150 ± 0.0016	9002-84-0*591

Most Influential reactions involving CHF3 (l)

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	6296.1	CHF3 (l) → CHF3 (g)	Δ_rH°(188.75 K) = 16.80 ± 0.14 kJ/mol	ThermoData 2004
0.000	6296.2	CHF3 (l) → CHF3 (g)	Δ_rH°(298.15 K) = 2.44 ± 0.77 (×7.829) kJ/mol	ThermoData 2004

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. 1.172 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		K. L. Caster, N. A. Seifert, B. Ruscic, A. W. Jasper, and K. Prozument, Dynamics of HCN, NHC, and HNCO Formation in the 193 nm Photodissociation of Formamide J. Phys. Chem. A (in press) (2024) [DOI: 10.1021/acs.jpca.4c02232]
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.