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S2 anion


Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering 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 by: John E. Bartmess

Quantity Value Units Method Reference Comment
Deltafgas-7.8 ± 5.2kcal/molAcidMoran and Ellison, 1988 
Deltafgas<11.0 ± 2.3kcal/molIMRBDillard and Franklin, 1968S- + COS -> S2- + CO. Also S2- + COS -> S3- + CO, etc. to n=6

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Ion clustering 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- bullet Carbon disulfide) + Carbon disulfide = (S2- bullet 2Carbon disulfide)

By formula: (S2- bullet CS2) + CS2 = (S2- bullet 2CS2)

Quantity Value Units Method Reference Comment
Deltar6.1kcal/molPHPMSHiraoka, Fujimaki, et al., 1994gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KN/AHiraoka, Fujimaki, et al., 1994gas phase; Entropy change calculated or estimated; M

S2- + Hydrogen cation = HS2

By formula: S2- + H+ = HS2

Quantity Value Units Method Reference Comment
Deltar329.9 ± 3.7kcal/molD-EAMoran and Ellison, 1988gas phase; B
Quantity Value Units Method Reference Comment
Deltar>344.60kcal/molIMRBGoodings, Bohme, et al., 1986gas phase; S- deprotonates H2S, Sn- for n>=2, does not.; B

S2- + Carbon disulfide = (S2- bullet Carbon disulfide)

By formula: S2- + CS2 = (S2- bullet CS2)

Quantity Value Units Method Reference Comment
Deltar19.1kcal/molPHPMSHiraoka, Fujimaki, et al., 1994gas phase; M
Quantity Value Units Method Reference Comment
Deltar29.cal/mol*KPHPMSHiraoka, Fujimaki, et al., 1994gas phase; M

(S2- bullet 4294967295sulfur) + sulfur = S2-

By formula: (S2- bullet 4294967295S) + S = S2-

Quantity Value Units Method Reference Comment
Deltar92.7 ± 5.2kcal/molN/AMoran and Ellison, 1988gas phase; B

S2- = CS4-

By formula: S2- = CS4-

Quantity Value Units Method Reference Comment
Deltar19.1 ± 1.5kcal/molTDAsHiraoka, Fujimaki, et al., 1994, 2gas phase; B

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Ion clustering 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 by: John E. Bartmess

Protonation reactions

S2- + Hydrogen cation = HS2

By formula: S2- + H+ = HS2

Quantity Value Units Method Reference Comment
Deltar329.9 ± 3.7kcal/molD-EAMoran and Ellison, 1988gas phase
Quantity Value Units Method Reference Comment
Deltar>344.60kcal/molIMRBGoodings, Bohme, et al., 1986gas phase; S- deprotonates H2S, Sn- for n>=2, does not.

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics 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:
B - John E. Bartmess
M - 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. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

S2- = CS4-

By formula: S2- = CS4-

Quantity Value Units Method Reference Comment
Deltar19.1 ± 1.5kcal/molTDAsHiraoka, Fujimaki, et al., 1994, 2gas phase; B

S2- + Carbon disulfide = (S2- bullet Carbon disulfide)

By formula: S2- + CS2 = (S2- bullet CS2)

Quantity Value Units Method Reference Comment
Deltar19.1kcal/molPHPMSHiraoka, Fujimaki, et al., 1994gas phase; M
Quantity Value Units Method Reference Comment
Deltar29.cal/mol*KPHPMSHiraoka, Fujimaki, et al., 1994gas phase; M

(S2- bullet Carbon disulfide) + Carbon disulfide = (S2- bullet 2Carbon disulfide)

By formula: (S2- bullet CS2) + CS2 = (S2- bullet 2CS2)

Quantity Value Units Method Reference Comment
Deltar6.1kcal/molPHPMSHiraoka, Fujimaki, et al., 1994gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
Deltar20.cal/mol*KN/AHiraoka, Fujimaki, et al., 1994gas phase; Entropy change calculated or estimated; M

(S2- bullet 4294967295sulfur) + sulfur = S2-

By formula: (S2- bullet 4294967295S) + S = S2-

Quantity Value Units Method Reference Comment
Deltar92.7 ± 5.2kcal/molN/AMoran and Ellison, 1988gas phase; B

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References, Notes

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

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 32S2-
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Constants for the following states are for S2- ions dissolved in KI crystals, from spectra studied at 2K Ikezawa and Rolfe, 1973 Vella and Rolfe, 1974; see also Sawicki and Fitchen, 1976. Host crystals other than KI lead to somewhat different values.
A' (2Piu) 20220 1 364.25 2 2.00        A' larrow X 20102
Vella and Rolfe, 1974
A (2Piu) 20143          A rarrow X' 19452
Ikezawa and Rolfe, 1973; Sawicki and Fitchen, 1976
           A lrarrow X 20025
Rolfe, 1968; Ikezawa and Rolfe, 1973; Vella and Rolfe, 1974; Sawicki and Fitchen, 1976
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
X' (2Pig,i) 573 1 600.8 3.01       3  
Holzer, Murphy, et al., 1969; Sawicki and Fitchen, 1976
X (2Pig,i) 0 600.8 4 2.16       5  
Vannotti and Morton, 1967

Notes

1The splitting is due to the crystal field, not spin-orbit coupling which in the 2Pig state amounts to approximately -420 cm-1 Vannotti and Morton, 1967, Vella and Rolfe, 1974.
2The Raman spectrum of ions pumped into this state by laser irradiation consists of a sharp line shifted by 362 cm-1 Holzer, Racine, et al., 1973.
3Raman sp.
4 Holzer, Murphy, et al., 1969 predict a gas phase frequency ~550 cm-1.
5EPR sp.
6From D00(S2) and the electron affinities of S2 and S.
7From laser photodetachment experiments Celotta, Bennett, et al., 1974.

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering 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

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Constants of diatomic molecules, References