Sulfur dioxide anion

Formula: O₂S^-
Molecular weight: 64.064
CAS Registry Number: 12143-17-8
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Vibrational and/or electronic energy levels

State: ?

Energy (cm^-1)		Med.	Transition	λ_min (nm)	λ_max (nm)	References


T_d = 8930 ± 65						Celotta, Bennett, et al., 1974
						Nimlos and Ellison, 1986

State: X

Vib. sym.	No.	Approximate type of mode	cm^-1		Med.	Method	References


a₁	1	Sym. stretch	944 ± 48		gas	PE	Nimlos and Ellison, 1986
	1	Sym. stretch	990.8		Ne	IR	Forney, Kellogg, et al., 2000
	1	Sym. stretch	985	m Cs	Ar	IR Ra	Milligan and Jacox, 1971 Bencivenni, Ramondo, et al., 1986
	1	Sym. stretch	990	Na	Ar	IR	Milligan and Jacox, 1971 Bencivenni, Ramondo, et al., 1986
	2	Bend	435 ± 100		gas	PE	Nimlos and Ellison, 1986
	2	Bend	495	w m Cs	Ar	IR	Milligan and Jacox, 1971 Bencivenni, Ramondo, et al., 1986
	2	Bend	495	Na	Ar	IR	Milligan and Jacox, 1971 Bencivenni, Ramondo, et al., 1986
b₂	3	Asym. stretch	1086.2		Ne	IR	Forney, Kellogg, et al., 2000
	3	Asym. stretch	1089.7		Ar	IR	Bencivenni, Ramondo, et al., 1986
	3	Asym. stretch	1081.8		Ar	IR	Bencivenni, Ramondo, et al., 1986
	3	Asym. stretch	1042	s Cs	Ar	IR	Milligan and Jacox, 1971 Bencivenni, Ramondo, et al., 1986
	3	Asym. stretch	1041	Na	Ar	IR	Milligan and Jacox, 1971 Bencivenni, Ramondo, et al., 1986

Additional references: Jacox, 1994, page 110; Jacox, 2003, page 148

Notes

Weak

Medium

Strong

Photodissociation threshold

Interaction with sodium.

Interaction with cesium

References

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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]

Nimlos and Ellison, 1986
Nimlos, M.R.; Ellison, G.B., Photoelectron spectroscopy of SO₂^-, S₃^-, and S₂O^-, J. Phys. Chem., 1986, 90, 2574. [all data]

Forney, Kellogg, et al., 2000
Forney, D.; Kellogg, C.B.; Thompson, W.E.; Jacox, M.E., The vibrational spectra of molecular ions isolated in solid neon. XVI. SO[sub 2][sup +], SO[sub 2][sup -], and (SO[sub 2])[sub 2][sup -], J. Chem. Phys., 2000, 113, 1, 86, https://doi.org/10.1063/1.481777 . [all data]

Milligan and Jacox, 1971
Milligan, D.E.; Jacox, M.E., Infrared Spectrum and Structure of the SO2- Radical Ion, J. Chem. Phys., 1971, 55, 3, 1003, https://doi.org/10.1063/1.1676176 . [all data]

Bencivenni, Ramondo, et al., 1986
Bencivenni, L.; Ramondo, F.; Teghil, R.; Polino, M., Infrared and raman study of matrix isolated M(SO2) molecules. The structure of the molecular ion SO2-, Inorg. Chim. Acta, 1986, 121, 2, 207, https://doi.org/10.1016/S0020-1693(00)84521-1 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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