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Helium cation


Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(He+ bullet helium) + helium = (He+ bullet 2helium)

By formula: (He+ bullet He) + He = (He+ bullet 2He)

Quantity Value Units Method Reference Comment
Deltar18.kJ/molDTPatterson, 1968gas phase; corrected for ln T term
Quantity Value Units Method Reference Comment
Deltar77.0J/mol*KDTPatterson, 1968gas phase; corrected for ln T term

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
-7.9300.SAMSGusinow, Gerber, et al., 1970gas phase

(He+ bullet 2helium) + helium = (He+ bullet 3helium)

By formula: (He+ bullet 2He) + He = (He+ bullet 3He)

Quantity Value Units Method Reference Comment
Deltar15.6 ± 0.63kJ/molPHPMSHiraoka and Mori, 1990gas phase
Quantity Value Units Method Reference Comment
Deltar74.1J/mol*KPHPMSHiraoka and Mori, 1990gas phase

Free energy of reaction

DeltarG° (kJ/mol) T (K) Method Reference Comment
3.77.DTHelm, 1976gas phase

(He+ bullet 3helium) + helium = (He+ bullet 4helium)

By formula: (He+ bullet 3He) + He = (He+ bullet 4He)

Quantity Value Units Method Reference Comment
Deltar2.7 ± 0.63kJ/molPHPMSHiraoka and Mori, 1990gas phase
Quantity Value Units Method Reference Comment
Deltar53.6J/mol*KPHPMSHiraoka and Mori, 1990gas phase

(He+ bullet 4helium) + helium = (He+ bullet 5helium)

By formula: (He+ bullet 4He) + He = (He+ bullet 5He)

Quantity Value Units Method Reference Comment
Deltar2.0 ± 0.63kJ/molPHPMSHiraoka and Mori, 1990gas phase
Quantity Value Units Method Reference Comment
Deltar45.2J/mol*KPHPMSHiraoka and Mori, 1990gas phase

He+ + helium = (He+ bullet helium)

By formula: He+ + He = (He+ bullet He)

Quantity Value Units Method Reference Comment
Deltar228.kJ/molEmSpecDehmer and Pratt, 1982gas phase
Deltar246.kJ/molSCATTERINGMittman and Weise, 1974gas phase

References

Go To: Top, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Patterson, 1968
Patterson, P.L., Evidence of the Existence of an He3+ Ion, J. Chem. Phys., 1968, 48, 8, 3625, https://doi.org/10.1063/1.1669660 . [all data]

Gusinow, Gerber, et al., 1970
Gusinow, M.A.; Gerber, R.A.; Gerardo, J.B., He3+ and He4+ in 300K Helium Plasmas: Their Effect on Recombination Loss of Electrons, Phys. Rev. Lett., 1970, 25, 18, 1248, https://doi.org/10.1103/PhysRevLett.25.1248 . [all data]

Hiraoka and Mori, 1990
Hiraoka, K.; Mori, T., Stability of Rare - Gas Cluster Ions, J. Chem. Phys., 1990, 92, 7, 4408, https://doi.org/10.1063/1.457751 . [all data]

Helm, 1976
Helm, H., The Mobilities and Equilibrium Reactions of Helium Ions in Helium at 77K, J. Phys. B, 1976, 9, 7, 1171, https://doi.org/10.1088/0022-3700/9/7/017 . [all data]

Dehmer and Pratt, 1982
Dehmer, P.M.; Pratt, S.T., Photoionization of ArKr, ArXe, and KrXe and bond dissociation energies of the rare gas dimer ions, J. Chem. Phys., 1982, 77, 4804. [all data]

Mittman and Weise, 1974
Mittman, H.U.; Weise, H.P., Scattering of Ions V. Elastic Scattering of the Symmetric Rare Gas Ion - Rare Gas Atom Systems, Z. Naturforsch., 1974, A29, 400. [all data]


Notes

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