Selected ATcT [1, 2] enthalpy of formation based on version 1.122e of the Thermochemical Network [3]

This version of ATcT results was generated from an expansion of version 1.122d [4] to include chemical species related to methyl acetate and methyl formate [5].

Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass		 ATcT ID
Cyanogen iodide cation[ICN]+ (g)I[C+]#N1271.51271.3± 1.6kJ/mol152.92136 ±
0.00080		34749-78-5*0

Representative Geometry of [ICN]+ (g)

spin ON           spin OFF
          

Top contributors to the provenance of ΔfH° of [ICN]+ (g)

The 14 contributors listed below account for 90.3% of the provenance of ΔfH° 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
43.12382.2 ICN (g) → I (g) + CN (g) ΔrH°(0 K) = 26980 ± 200 cm-1Costen 1999, note unc2
9.72381.2 ICN (g) + CH3Br (g) → BrCN (g) + CH3I (g) ΔrH°(0 K) = 2.43 ± 1.0 kcal/molRuscic unpub
8.02381.3 ICN (g) + CH3Br (g) → BrCN (g) + CH3I (g) ΔrH°(0 K) = 2.43 ± 1.1 kcal/molRuscic unpub
6.92382.1 ICN (g) → I (g) + CN (g) ΔrH°(0 K) = 26580 ± 500 cm-1Nadler 1985
6.72381.1 ICN (g) + CH3Br (g) → BrCN (g) + CH3I (g) ΔrH°(0 K) = 2.40 ± 1.2 kcal/molRuscic unpub
3.92382.4 ICN (g) → I (g) + CN (g) ΔrH°(0 K) = 26200 ± 400 (×1.646) cm-1Black 1990, note unc2
2.52383.1 ICN (g) → I+ (g) + CN (g) ΔrH°(0 K) = 13.679 ± 0.045 (×2.278) eVDibeler 1967b, AE corr, est unc
1.42374.2 ICN (g) + H2 (g) → HCN (g) + HI (g) ΔrH°(0 K) = -15.93 ± 3.1 kcal/molRuscic unpub
1.42378.2 ICN (g) + CH4 (g) → HCN (g) + CH3I (g) ΔrH°(0 K) = -1.03 ± 3.1 kcal/molRuscic unpub
1.32374.3 ICN (g) + H2 (g) → HCN (g) + HI (g) ΔrH°(0 K) = -15.84 ± 3.2 kcal/molRuscic unpub
1.32378.3 ICN (g) + CH4 (g) → HCN (g) + CH3I (g) ΔrH°(0 K) = -0.97 ± 3.2 kcal/molRuscic unpub
1.22374.1 ICN (g) + H2 (g) → HCN (g) + HI (g) ΔrH°(0 K) = -14.57 ± 3.4 kcal/molRuscic unpub
1.22378.1 ICN (g) + CH4 (g) → HCN (g) + CH3I (g) ΔrH°(0 K) = -0.05 ± 3.4 kcal/molRuscic unpub
1.02377.2 ICN (g) + HBr (g) → BrCN (g) + HI (g) ΔrH°(0 K) = 5.21 ± 3.1 kcal/molRuscic unpub

Top 10 species with enthalpies of formation correlated to the ΔfH° 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    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass		 ATcT ID
99.8 Cyanogen iodideICN (g)IC#N222.7222.1± 1.6kJ/mol152.92191 ±
0.00080		506-78-5*0
32.5 Isocyanogen iodideINC (g)IN=[C]341.8342.1± 4.9kJ/mol152.92191 ±
0.00080		66004-32-8*0
25.0 Cyanogen bromideBrCN (g)BrC#N186.7180.1± 1.1kJ/mol105.9214 ±
0.0013		506-68-3*0
25.0 Cyanogen bromide cation[BrCN]+ (g)Br[C+]#N1331.21324.9± 1.1kJ/mol105.9209 ±
0.0013		34749-77-4*0
7.8 Isocyanogen bromideBrNC (g)BrN=[C]341.1335.4± 3.4kJ/mol105.9214 ±
0.0013		65997-98-0*0
6.5 NitrilomethylCN (g)[C]#N436.73440.02± 0.15kJ/mol26.01744 ±
0.00080		2074-87-5*0
6.5 Cyanogen bromide anion[BrCN]- (g)BrC#[N-]57.854.2± 3.8kJ/mol105.9220 ±
0.0013		54092-05-6*0
5.6 Isocyanogen bromide anion[BrNC]- (g)BrN=[C-]105.0101.8± 4.6kJ/mol105.9220 ±
0.0013		*238754-53-5*0
4.8 Cyanogen chlorideClCN (g)ClC#N134.94135.64± 0.46kJ/mol61.4701 ±
0.0012		506-77-4*0
4.5 Cyanic fluorideFCN (g)FC#N8.799.12± 0.71kJ/mol45.01584 ±
0.00080		1495-50-7*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
0.9962384.1 ICN (g) → [ICN]+ (g) ΔrH°(0 K) = 10.870 ± 0.001 eVMyer 1970a
0.0022384.2 ICN (g) → [ICN]+ (g) ΔrH°(0 K) = 10.87 ± 0.02 eVDibeler 1967b
0.0002384.4 ICN (g) → [ICN]+ (g) ΔrH°(0 K) = 10.91 ± 0.02 (×2) eVHeilbronner 1970
0.0002384.3 ICN (g) → [ICN]+ (g) ΔrH°(0 K) = 10.91 ± 0.05 eVLake 1970, est unc
References (for your convenience, also available in RIS and BibTex format)
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 21st 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. 1.122e of the Thermochemical Network, Argonne National Laboratory (2019); available at ATcT.anl.gov
4   L. Cheng, J. Gauss, B. Ruscic, P. Armentrout, and J. Stanton,
Bond Dissociation Energies for Diatomic Molecules Containing 3d Transition Metals: Benchmark Scalar-Relativistic Coupled-Cluster Calculations for Twenty Molecules.
J. Chem. Theory Comput. 13, 1044-1056 (2017) [DOI: 10.1021/acs.jctc.6b00970]
5   J. P. Porterfield, D. H. Bross, B. Ruscic, J. H. Thorpe, T. L. Nguyen, J. H. Baraban, J. F. Stanton, J. W. Daily, and G. B. Ellison,
Thermal Decomposition of Potential Ester Biofuels, Part I: Methyl Acetate and Methyl Butanoate.
J. Chem. Phys. A 121, 4658-4677 (2017) [DOI: 10.1021/acs.jpca.7b02639] (Veronica Vaida Festschrift)
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]
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]).
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.