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].

Chlorine difluoride

Formula: ClFF (g)

CAS RN: 91483-78-2

ATcT ID: 91483-78-2*0

SMILES: [Cl]FF

InChI: InChI=1S/ClF2/c1-3-2

InChIKey: YCBRPQAPWMCFGQ-UHFFFAOYSA-N

Hills Formula: Cl1F2

2D Image:

Aliases: ClFF; Chlorine difluoride; Difluorochlorine; FFCl

Relative Molecular Mass: 73.44951 ± 0.00090

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
22.5	23.9	± 1.9	kJ/mol

3D Image of ClFF (g)

spin ON spin OFF

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

The 20 contributors listed below account only for 81.3% of the provenance of Δ_fH° of ClFF (g).
A total of 30 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
8.5	906.4	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 59.57 ± 1.50 kcal/mol	Ruscic W1RO
7.5	907.4	ClFF (g) → [ClFF]+ (g)	Δ_rH°(0 K) = 13.730 ± 0.040 eV	Ruscic W1RO
7.5	906.2	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 60.48 ± 1.60 kcal/mol	Ruscic G4
7.1	911.4	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -15.35 ± 1.2 (×1.067) kcal/mol	Ruscic W1RO
6.9	911.2	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -17.39 ± 1.3 kcal/mol	Ruscic G4
6.5	906.1	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 59.87 ± 1.72 kcal/mol	Ruscic G3X
6.0	911.1	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -16.79 ± 1.4 kcal/mol	Ruscic G3X
5.0	908.4	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.539 ± 0.050 eV	Ruscic W1RO
4.6	911.3	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -16.90 ± 1.6 kcal/mol	Ruscic CBS-n
4.1	906.3	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 60.37 ± 2.16 kcal/mol	Ruscic CBS-n
3.3	908.2	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.540 ± 0.061 eV	Ruscic G4
2.2	907.2	ClFF (g) → [ClFF]+ (g)	Δ_rH°(0 K) = 13.694 ± 0.073 eV	Ruscic G4
1.7	908.1	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.527 ± 0.085 eV	Ruscic G3X
1.5	909.4	[ClFF]+ (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = -257.05 ± 1.50 kcal/mol	Ruscic W1RO
1.4	908.3	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.584 ± 0.092 eV	Ruscic CBS-n
1.4	910.4	[ClFF]- (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 141.17 ± 1.50 kcal/mol	Ruscic W1RO
1.4	907.1	ClFF (g) → [ClFF]+ (g)	Δ_rH°(0 K) = 13.754 ± 0.093 eV	Ruscic G3X
1.3	909.2	[ClFF]+ (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = -255.30 ± 1.60 kcal/mol	Ruscic G4
1.2	910.2	[ClFF]- (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 142.12 ± 1.60 kcal/mol	Ruscic G4
1.2	922.1	FCl(F)F (g) + ClF (g) → 2 FClF (g)	Δ_rH°(0 K) = 27.30 ± 1.1 (×1.414) kcal/mol	Ruscic G3X

Top 10 species with enthalpies of formation correlated to the Δ_fH° of ClFF (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
37.5	Chlorine difluoride cation	[ClFF]+ (g)	1346.3	1344.9	± 2.1	kJ/mol	73.44896 ± 0.00090	86825-59-4*0
35.9	Chlorine difluoride anion	[ClFF]- (g)	-319.0	-319.0	± 2.2	kJ/mol	73.45005 ± 0.00090	91419-41-9*0
30.8	Chlorine difluoride	FClF (g)	-47.0	-48.2	± 1.3	kJ/mol	73.44951 ± 0.00090	24801-48-7*0
20.0	Chlorine difluoride anion	[FClF]- (g)	-504.9	-505.7	± 1.9	kJ/mol	73.45005 ± 0.00090	16892-05-0*0
16.7	Chlorine difluoride cation	[FClF]+ (g)	998.8	996.6	± 1.7	kJ/mol	73.44896 ± 0.00090	32629-46-2*0
8.4	Chlorine trifluoride	FCl(F)F (g)	-158.63	-162.73	± 0.86	kJ/mol	92.44791 ± 0.00090	7790-91-2*0
6.0	Chlorine pentafluoride	FCl(F)(F)(F)F (g)	-226.0	-234.1	± 1.3	kJ/mol	130.44472 ± 0.00090	13637-63-3*0
3.2	Chlorine trifluoride cation	[FCl(F)F]+ (g)	1053.5	1049.2	± 2.3	kJ/mol	92.44736 ± 0.00090	478167-77-0*0
3.1	Chlorine fluoride cation	[ClF]+ (g)	1165.52	1165.70	± 0.49	kJ/mol	54.45055 ± 0.00090	12432-44-9*0
2.3	Chlorine pentafluoride cation	[FCl(F)(F)(F)F]+ (g)	1005.9	996.9	± 3.2	kJ/mol	130.44417 ± 0.00090	478167-78-1*0

Most Influential reactions involving ClFF (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
0.322	907.4	ClFF (g) → [ClFF]+ (g)	Δ_rH°(0 K) = 13.730 ± 0.040 eV	Ruscic W1RO
0.217	908.4	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.539 ± 0.050 eV	Ruscic W1RO
0.145	908.2	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.540 ± 0.061 eV	Ruscic G4
0.125	911.4	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -15.35 ± 1.2 (×1.067) kcal/mol	Ruscic W1RO
0.121	911.2	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -17.39 ± 1.3 kcal/mol	Ruscic G4
0.105	911.1	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -16.79 ± 1.4 kcal/mol	Ruscic G3X
0.096	907.2	ClFF (g) → [ClFF]+ (g)	Δ_rH°(0 K) = 13.694 ± 0.073 eV	Ruscic G4
0.085	906.4	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 59.57 ± 1.50 kcal/mol	Ruscic W1RO
0.080	911.3	ClFF (g) → FClF (g)	Δ_rH°(0 K) = -16.90 ± 1.6 kcal/mol	Ruscic CBS-n
0.075	906.2	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 60.48 ± 1.60 kcal/mol	Ruscic G4
0.075	908.1	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.527 ± 0.085 eV	Ruscic G3X
0.065	906.1	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 59.87 ± 1.72 kcal/mol	Ruscic G3X
0.064	908.3	[ClFF]- (g) → ClFF (g)	Δ_rH°(0 K) = 3.584 ± 0.092 eV	Ruscic CBS-n
0.059	907.1	ClFF (g) → [ClFF]+ (g)	Δ_rH°(0 K) = 13.754 ± 0.093 eV	Ruscic G3X
0.052	907.3	ClFF (g) → [ClFF]+ (g)	Δ_rH°(0 K) = 13.704 ± 0.099 eV	Ruscic CBS-n
0.041	906.3	ClFF (g) → Cl (g) + 2 F (g)	Δ_rH°(0 K) = 60.37 ± 2.16 kcal/mol	Ruscic CBS-n

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.