Selected ATcT [1, 2] enthalpy of formation based on version 1.130 of the Thermochemical Network [3]

This version of ATcT results[4] was generated by additional expansion of version 1.128 [5,6] to include with the calculations provided in reference [4].

Helium anion

Formula: He- (g, 2p3 4S3/2)
CAS RN: 14452-58-5
ATcT ID: 14452-58-5*4
SMILES: [He-]
InChI: InChI=1S/He/q-1
InChIKey: GQCTUJCUOFABIY-UHFFFAOYSA-N
Hills Formula: He1-

2D Image:

[He-]
Aliases: He-; Helium anion; Helium ion (1-); Helium atom anion; Helium atom ion (1-); Atomic helium anion; Atomic helium ion (1-)
Relative Molecular Mass: 4.0031506 ± 0.0000020

   ΔfH°(0 K)   ΔfH°(298.15 K)UncertaintyUnits
5724.965724.96± 0.32kJ/mol

3D Image of He- (g, 2p3 4S3/2)

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Top contributors to the provenance of ΔfH° of He- (g, 2p3 4S3/2)

The 3 contributors listed below account for 97.4% of the provenance of ΔfH° of He- (g, 2p3 4S3/2).

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
43.28618.1 He- (g, 1s.2s.2p 4P) → He- (g, 2p3 4S3/2) ΔrH°(0 K) = 39.59308 ± 0.005 eVSalas 2014, est unc
43.28618.2 He- (g, 1s.2s.2p 4P) → He- (g, 2p3 4S3/2) ΔrH°(0 K) = 39.59307 ± 0.005 eVTurbiner 2013, Bylicki 1996, Salas 2014, est unc
10.88617.1 He- (g, 2p3 4S3/2) → He (g, triplet) ΔrH°(0 K) = -39.5132 ± 0.010 eVTurbiner 2013, Bylicki 1996, est unc, Tech 1971


Most Influential reactions involving He- (g, 2p3 4S3/2)

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
0.4328618.1 He- (g, 1s.2s.2p 4P) → He- (g, 2p3 4S3/2) ΔrH°(0 K) = 39.59308 ± 0.005 eVSalas 2014, est unc
0.4328618.2 He- (g, 1s.2s.2p 4P) → He- (g, 2p3 4S3/2) ΔrH°(0 K) = 39.59307 ± 0.005 eVTurbiner 2013, Bylicki 1996, Salas 2014, est unc
0.1088617.1 He- (g, 2p3 4S3/2) → He (g, triplet) ΔrH°(0 K) = -39.5132 ± 0.010 eVTurbiner 2013, Bylicki 1996, est unc, Tech 1971
0.0178617.2 He- (g, 2p3 4S3/2) → He (g, triplet) ΔrH°(0 K) = -39.517 ± 0.025 eVTurbiner 2013, Bylicki 1996, Trabert 1992, Walter 1994, Tech 1971
0.0048617.3 He- (g, 2p3 4S3/2) → He (g, triplet) ΔrH°(0 K) = -39.537 ± 0.050 eVNicolaides 1981, est unc, Tech 1971
0.0048617.4 He- (g, 2p3 4S3/2) → He (g, triplet) ΔrH°(0 K) = -39.526 ± 0.050 eVChung 1979, est unc, Tech 1971

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 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. 1.130 of the Thermochemical Network. Argonne National Laboratory, Lemont, Illinois 2023; available at ATcT.anl.gov
[DOI: 10.17038/CSE/1997229]
4   N. Genossar, P. B. Changala, B. Gans, J.-C. Loison, S. Hartweg, M.-A. Martin-Drumel, G. A. Garcia, J. F. Stanton, B. Ruscic, and J. H. Baraban
Ring-Opening Dynamics of the Cyclopropyl Radical and Cation: the Transition State Nature of the Cyclopropyl Cation
J. Am. Chem. Soc. 144, 18518-18525 (2022) [DOI: 10.1021/jacs.2c07740]
5   B. Ruscic and D. H. Bross
Active Thermochemical Tables: The Thermophysical and Thermochemical Properties of Methyl, CH3, and Methylene, CH2, Corrected for Nonrigid Rotor and Anharmonic Oscillator Effects.
Mol. Phys. e1969046 (2021) [DOI: 10.1080/00268976.2021.1969046]
6   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]
7   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]
8   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 [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.