S2 anion

• Formula: S₂^-
• Molecular weight: 64.131
• CAS Registry Number: 12185-15-8
• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Constants of diatomic molecules
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • Ion clustering data
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Gas phase 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: John E. Bartmess

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References, Notes

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

Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

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

(S₂^- • ) +  = (S₂^- • 2)

By formula: (S₂^- • CS₂) + CS₂ = (S₂^- • 2CS₂)

S₂^- +  = HS₂

By formula: S₂^- + H⁺ = HS₂

S₂^- +  = (S₂^- • )

By formula: S₂^- + CS₂ = (S₂^- • CS₂)

(S₂^- • 4294967295) +  = S₂^-

By formula: (S₂^- • 4294967295S) + S = S₂^-

S₂^- = CS₄^-

By formula: S₂^- = CS₄^-

Constants of diatomic molecules

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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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1977

Notes

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Constants of diatomic molecules, Notes

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

Moran and Ellison, 1988
Moran, S.; Ellison, G.B., Photoelectron Spectroscopy of Sulfur Ions, J. Phys. Chem., 1988, 92, 7, 1794, https://doi.org/10.1021/j100318a021 . [all data]

Dillard and Franklin, 1968
Dillard, J.G.; Franklin, J.L., Ion-Molecule Reactions of Negative Ions. I. Negative Ions of Sulfur, J. Chem. Phys., 1968, 48, 5, 2349, https://doi.org/10.1063/1.1669435 . [all data]

Hiraoka, Fujimaki, et al., 1994
Hiraoka, K.; Fujimaki, S.; Aruga, K.; Yamabe, S., Frontier-Controlled Structures of the Gas-Phase A+-(CS2)n Clusters ,A+- = S2+, CS2+, S2-, and CS2-, J. Phys. Chem., 1994, 98, 7, 1802, https://doi.org/10.1021/j100058a014 . [all data]

Goodings, Bohme, et al., 1986
Goodings, J.M.; Bohme, D.K.; Elguindi, K.; Fox, A., Sulphur Anion Chemistry in Hydrocarbon Flames with H₂S, OCS, and SO₂ Additives, Can. J. Chem., 1986, 64, 4, 689, https://doi.org/10.1139/v86-110 . [all data]

Hiraoka, Fujimaki, et al., 1994, 2
Hiraoka, K.; Fujimaki, S.; Aruga, K., Frontier-controlled Structures of the Gas Phas Clusters A+/-(CS2)n, A+/- = S2+, CS2+, S2-, and CS2-, J. Phys. Chem. (1994), 1994, 98, 7, 1802-1809, https://doi.org/10.1021/j100058a014 . [all data]

Ikezawa and Rolfe, 1973
Ikezawa, M.; Rolfe, J., Zero-phonon transitions in O₂^-, S₂^-, and Se₂^-, and SeS^- molecules dissolved in alkali halide crystals, J. Chem. Phys., 1973, 58, 2024. [all data]

Vella and Rolfe, 1974
Vella, G.J.; Rolfe, J., Zero-phonon absorption transitions in S₂^- and Se₂^- molecules dissolved in potassium iodide crystals, J. Chem. Phys., 1974, 61, 41. [all data]

Sawicki and Fitchen, 1976
Sawicki, C.A.; Fitchen, D.B., Laser-excited spectra and reorientation of the S₂^- ion in alkali halides, J. Chem. Phys., 1976, 65, 11, 4497-4507. [all data]

Rolfe, 1968
Rolfe, J., Emission spectra of S₂^-, Se₂^-, and SeS^- ions in KI crystals, J. Chem. Phys., 1968, 49, 4193. [all data]

Holzer, Murphy, et al., 1969
Holzer, W.; Murphy, W.F.; Bernstein, H.J., Raman spectra of negative molecular ions doped in alkali halide crystals, J. Mol. Spectrosc., 1969, 32, 13. [all data]

Vannotti and Morton, 1967
Vannotti, L.E.; Morton, J.R., Paramagnetic-resonance spectra of S2^- in alkali halides, Phys. Rev., 1967, 161, 2, 282-286. [all data]

Holzer, Racine, et al., 1973
Holzer, W.; Racine, S.; Cipriani, J., Intensity and line shape study of resonance Raman effect of S₂^- and S₃^- doped in a potassium iodide single crystal in Advances in Raman Spectroscopy, J.P. Mathieu, ed(s)., Heyden & Son Ltd., New York, 1973, 393-400. [all data]

Celotta, Bennett, et al., 1974
Celotta, R.S.; Bennett, R.A.; Hall, J.L., Laser Photodetachment Determination of the Electron Affinities of OH, NH₂, NH, SO₂, and S₂, J. Chem. Phys., 1974, 60, 5, 1740, https://doi.org/10.1063/1.1681268 . [all data]

Notes

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• Symbols used in this document:
  

  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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