Selected ATcT [1, 2] enthalpy of formation based on version 1.140 of the Thermochemical Network [3]

This version of ATcT results[3] was generated by additional expansion of version 1.130 to fully include the highest-level electronic structure computations described in reference [4].

Cyanogen iodide anion

Formula: [ICN]- (g)

CAS RN: 1356929-44-6

ATcT ID: 1356929-44-6*0

SMILES: IC#[N-]

InChI: InChI=1S/CIN/c2-1-3/q-1

InChIKey: FXRWYLRSKYDVIN-UHFFFAOYSA-N

Hills Formula: C1I1N1-

2D Image:

Aliases: [ICN]-; Cyanogen iodide anion; Cyanogen iodide ion (1-); Cyanic iodide anion; Cyanic iodide ion (1-); ICN-

Relative Molecular Mass: 152.92246 ± 0.00080

Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units
86.5	88.8	± 8.1	kJ/mol

3D Image of [ICN]- (g)

spin ON spin OFF

Top contributors to the provenance of Δ_fH° of [ICN]- (g)

The 2 contributors listed below account for 99.9% of the provenance of Δ_fH° of [ICN]- (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
69.2	2856.1	[ICN]- (g) → I (g, 2P3/2) + CN (g)	Δ_rH°(0 K) = 4.69 ± 0.10 eV	Miller 2012, est unc
30.7	2855.1	[ICN]- (g) → I (g, 2P3/2) + [CN]- (g)	Δ_rH°(0 K) = 0.99 ± 0.15 eV	Miller 2012, est unc

Top 10 species with enthalpies of formation correlated to the Δ_fH° of [ICN]- (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	Image	Δ_fH°(0 K)	Δ_fH°(298.15 K)	Uncertainty	Units	Relative Molecular Mass	ATcT ID
86.4	Isocyanogen iodide anion	[INC]- (g)		123.0	125.1	± 9.3	kJ/mol	152.92246 ± 0.00080	66004-32-80
1.3	Nitrilomethyl	CN (g)		436.72	440.01	± 0.14	kJ/mol	26.01744 ± 0.00080	2074-87-5*0

Most Influential reactions involving [ICN]- (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
0.854	2859.1	ICN (g) + [INC]- (g) → INC (g) + [ICN]- (g)	Δ_rH°(0 K) = 6916.7 ± 300 cm-1	McCoy 2013, est unc
0.692	2856.1	[ICN]- (g) → I (g, 2P3/2) + CN (g)	Δ_rH°(0 K) = 4.69 ± 0.10 eV	Miller 2012, est unc
0.544	2858.1	[ICN]- (g) → [INC]- (g)	Δ_rH°(0 K) = 3075.6 ± 530 cm-1	McCoy 2013, est unc
0.307	2855.1	[ICN]- (g) → I (g, 2P3/2) + [CN]- (g)	Δ_rH°(0 K) = 0.99 ± 0.15 eV	Miller 2012, est unc

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. 1.140 of the Thermochemical Network (2024); available at ATcT.anl.gov
4		J. H. Thorpe, J. L. Kilburn, D. Feller, P. B. Changala, D. H. Bross, B. Ruscic, and J. F. Stanton, Elaborated Thermochemical Treatment of HF, CO, N2, and H2O: Insight into HEAT and Its Extensions J. Chem. Phys. 155, 184109 (2021) [DOI: 10.1063/5.0069322]
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.