Selected ATcT [1, 2] enthalpy of formation based on version 1.202 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.176 in order to include species related to the thermochemistry of glycine[4].

Isocyanic fluoride cation

Formula: [FNC]+ (g)

CAS RN: *16992-26-0

ATcT ID: *16992-26-0*0

SMILES: [C+]=NF

SMILES: FN=[C+]

InChI: InChI=1S/CFN/c1-3-2/q+1

InChIKey: LCVWPXSWTJOVSB-UHFFFAOYSA-N

Hills Formula: C1F1N1+

2D Image:

Aliases: [FNC]+; Isocyanic fluoride cation; Isocyanic fluoride ion (1+); (Fluoronitrilio)methyl; Isocyanogen fluoride cation; Isocyanogen fluoride ion (1+); Fluorine isocyanide cation; Fluorine isocyanide ion (1+); FNC+

Relative Molecular Mass: 45.01529 ± 0.00080

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
1618.0	1618.6	± 4.0	kJ/mol

3D Image of [FNC]+ (g)

spin ON spin OFF

Top contributors to the provenance of Δ_fH° of [FNC]+ (g)

The 7 contributors listed below account for 91.1% of the provenance of Δ_fH° of [FNC]+ (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
43.2	2885.4	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.657 ± 0.050 eV	Ruscic W1RO
16.9	2885.2	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.632 ± 0.080 eV	Ruscic G4
10.8	2885.1	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.650 ± 0.100 eV	Ruscic G3X
8.9	2885.3	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.659 ± 0.110 eV	Ruscic CBS-n
6.9	2889.10	FCN (g) → FNC (g)	Δ_rH°(0 K) = 293.8 ± 2.5 kJ/mol	Klopper 2010a
2.4	2889.9	FCN (g) → FNC (g)	Δ_rH°(0 K) = 69.5 ± 1.0 kcal/mol	Lee 1995b, Lee 1995a
1.7	2889.8	FCN (g) → FNC (g)	Δ_rH°(0 K) = 70.29 ± 1.2 kcal/mol	Ruscic W1RO

Top 10 species with enthalpies of formation correlated to the Δ_fH° of [FNC]+ (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
44.8	Isocyanic fluoride	FNC (g)	300.9	302.7	± 1.8	kJ/mol	45.01584 ± 0.00080	16992-26-0*0
18.5	Cyanic fluoride	FCN (g)	8.49	8.82	± 0.74	kJ/mol	45.01584 ± 0.00080	1495-50-7*0
14.1	Isocyanic fluoride anion	[FNC]- (g)	73.9	75.6	± 5.7	kJ/mol	45.01639 ± 0.00080	357426-78-9*0
12.3	Cyanic fluoride cation	[FCN]+ (g)	1294.2	1294.6	± 1.1	kJ/mol	45.01529 ± 0.00080	62532-69-8*0
4.7	Cyanic fluoride anion	[FCN]- (g)	-20.7	-18.7	± 2.9	kJ/mol	45.01639 ± 0.00080	34507-50-1*0
2.2	Cyanogen chloride	ClCN (g)	135.14	135.84	± 0.43	kJ/mol	61.4701 ± 0.0012	506-77-4*0
2.1	Fluoromethane	CH3F (g)	-227.44	-235.47	± 0.24	kJ/mol	34.03292 ± 0.00083	593-53-3*0
2.0	Fluoromethane	CH3F (l)		-251.65	± 0.25	kJ/mol	34.03292 ± 0.00083	593-53-3*590
1.9	Fluoroacetylene	HCCF (g)	104.99	105.71	± 0.39	kJ/mol	44.0277 ± 0.0016	2713-09-9*0
1.7	Hydrogen cyanide	HCN (g)	129.688	129.303	± 0.087	kJ/mol	27.02538 ± 0.00081	74-90-8*0

Most Influential reactions involving [FNC]+ (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
0.541	2885.4	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.657 ± 0.050 eV	Ruscic W1RO
0.211	2885.2	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.632 ± 0.080 eV	Ruscic G4
0.135	2885.1	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.650 ± 0.100 eV	Ruscic G3X
0.111	2885.3	FNC (g) → [FNC]+ (g)	Δ_rH°(0 K) = 13.659 ± 0.110 eV	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. 1.202 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		B. Ruscic and D. H. Bross Accurate and Reliable Thermochemistry by Data Analysis of Complex Thermochemical Networks using Active Thermochemical Tables: The Case of Glycine Thermochemistry Faraday Discuss. (in press) (2024) [DOI: 10.1039/D4FD00110A]
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.