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

This version of ATcT results was generated from an expansion of version 1.122e [4] to include results centered on the determination of the appearance energy of CH3+ from CH4. [5].

Species Name Formula Image    ΔfH°(0 K)    ΔfH°(298.15 K) Uncertainty Units Relative
Molecular
Mass		 ATcT ID
Iodine atomI (g)[I]107.157106.757± 0.0021kJ/mol126.904470 ±
0.000030		14362-44-8*0

Representative Geometry of I (g)

spin ON           spin OFF
          

Top contributors to the provenance of ΔfH° of I (g)

The 5 contributors listed below account for 93.2% of the provenance of ΔfH° of I (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
21.81064.2 I2 (cr,l) → I2 (g) ΔrG°(298.15 K) = 4.616 ± 0.002 kcal/molGiauque 1931, Baxter 1915, Baxter 1907, 3rd Law, est unc
21.81064.4 I2 (cr,l) → I2 (g) ΔrG°(298.15 K) = 4.618 ± 0.002 kcal/molGerry 1932, Giauque 1931, 3rd Law, est unc
21.81069.6 I2 (cr,l) → I2 (g) ΔrH°(298.15 K) = 14.919 ± 0.002 kcal/molShirley 1959, Baxter 1907, Baxter 1915, 2nd Law
21.81069.8 I2 (cr,l) → I2 (g) ΔrH°(325.8 K) = 14.799 ± 0.002 kcal/molShirley 1959, Baxter 1907, Baxter 1915, 2nd Law
5.91063.8 I2 (cr,l) → I2 (g) ΔrG°(298.15 K) = 4.614 ± 0.002 (×1.915) kcal/molBaxter 1915, Baxter 1907, 3rd Law

Top 10 species with enthalpies of formation correlated to the ΔfH° of I (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
100.0 Iodine atomI (g, 2P3/2)[I]107.157106.757± 0.0021kJ/mol126.904470 ±
0.000030		14362-44-8*1
99.9 Iodine atomI (g, 2P1/2)[I]198.109197.709± 0.0021kJ/mol126.904470 ±
0.000030		14362-44-8*2
99.9 DiiodineI2 (g)II65.49762.417± 0.0041kJ/mol253.808940 ±
0.000060		7553-56-2*0
89.7 IodideI- (g)[I-]-187.995-188.396± 0.0021kJ/mol126.905019 ±
0.000030		20461-54-5*0
31.1 Iodine atom cationI+ (g)[I+]1115.5491115.149± 0.0062kJ/mol126.903921 ±
0.000030		22541-93-1*0
22.5 Diiodine cation[I2]+ (g)I[I+]963.523960.408± 0.018kJ/mol253.808391 ±
0.000060		28712-14-3*0
16.1 Iodine monochlorideICl (g)ICl19.02417.391± 0.013kJ/mol162.35717 ±
0.00090		7790-99-0*0
5.4 Hydrogen iodideHI (g)I28.64526.470± 0.036kJ/mol127.912410 ±
0.000076		10034-85-2*0
3.1 Iodine monochlorideICl (cr)ICl-36.511-35.537± 0.063kJ/mol162.35717 ±
0.00090		7790-99-0*510
3.1 Iodine monochlorideICl (cr,l)ICl-36.511-35.537± 0.063kJ/mol162.35717 ±
0.00090		7790-99-0*500

Most Influential reactions involving I (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
1.0004714.1 CH2CHI (g) → [CH2CH]+ (g) + I (g) ΔrH°(0 K) = 11.262 ± 0.010 eVShuman 2008
0.9991080.1 I (g) → I (g, 2P3/2) ΔrH°(0 K) = 0.00 ± 0.00 cm-1triv
0.9971077.1 I (g) → I+ (g) ΔrH°(0 K) = 84295.0 ± 0.5 cm-1Radzig 1985
0.9901078.2 I- (g) → I (g) ΔrH°(0 K) = 3.059038 ± 0.000010 eVHanstorp 1992
0.9861105.1 ICl (g) → I (g) + Cl (g) ΔrH°(0 K) = 17367.0 ± 1.0 cm-1Hulthen 1961, note ICl, Cl 35.45
0.5761114.2 IBr (g) → I (g) + Br (g) ΔrH°(0 K) = 14657 ± 4 cm-1Brown 1932a, Eberhardt 1959, apud Gurvich TPIS
0.5595157.2 C6H5I (g) → [C6H5]+ (g) + I (g) ΔrH°(0 K) = 11.178 ± 0.011 eVStevens 2009
0.4994382.2 CH3I (g) → [CH3]+ (g) + I (g) ΔrH°(0 K) = 12.251 ± 0.0024 eVLee 2007
0.4362382.2 ICN (g) → I (g) + CN (g) ΔrH°(0 K) = 26980 ± 200 cm-1Costen 1999, note unc2
0.3681114.1 IBr (g) → I (g) + Br (g) ΔrH°(0 K) = 14660 ± 5 cm-1Brown 1932a
0.2804382.1 CH3I (g) → [CH3]+ (g) + I (g) ΔrH°(0 K) = 12.248 ± 0.003 (×1.067) eVBodi 2009
0.2391100.1 [I3]+ (g) → 3 I (g) ΔrH°(0 K) = -148.76 ± 2 kcal/molThanthiriwatte 2014, est unc
0.2311084.1 I- (g) + Cl2 (g) → [Cl2]- (g) + I (g) ΔrH°(0 K) = 0.66 ± 0.03 eVChupka 1971b
0.1631101.1 [I3]- (g) → 3 I (g) ΔrH°(0 K) = 138.34 ± 2 kcal/molThanthiriwatte 2014, est unc
0.1461132.1 HOI (g) → H (g) + O (g) + I (g) ΔrH°(0 K) = 620.5 ± 8 kJ/molMarshall 2008, est unc
0.1301119.1 IO (g) → I (g) + O (g) ΔrH°(0 K) = 54.8 ± 0.3 (×1.795) kcal/molDooley 2008
0.1131079.1 I- (g) + F2 (g) → [F2]- (g) + I (g) ΔrH°(0 K) = 0.00 ± 0.03 (×1.445) eVChupka 1971b
0.1111126.3 IO (g) + Br (g) → BrO (g) + I (g) ΔrH°(0 K) = -1.49 ± 0.6 kcal/molPeterson 2006
0.1051124.3 IO (g) + Cl (g) → ClO (g) + I (g) ΔrH°(0 K) = -9.14 ± 0.6 kcal/molPeterson 2006
0.1051119.2 IO (g) → I (g) + O (g) ΔrH°(0 K) = 54.24 ± 0.6 kcal/molPeterson 2006
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. 1.122g of the Thermochemical Network (2019); available at ATcT.anl.gov
4   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)
5   Y.-C. Chang, B. Xiong, D. H. Bross, B. Ruscic, and C. Y. Ng,
A Vacuum Ultraviolet laser Pulsed Field Ionization-Photoion Study of Methane (CH4): Determination of the Appearance Energy of Methylium From Methane with Unprecedented Precision and the Resulting Impact on the Bond Dissociation Energies of CH4 and CH4+.
Phys. Chem. Chem. Phys. 19, 9592-9605 (2017) [DOI: 10.1039/c6cp08200a] (part of 2017 PCCP Hot Articles collection)
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.