Disulfur monoxide

• Formula: OS₂
• Molecular weight: 80.129
• IUPAC Standard InChI: InChI=1S/OS2/c1-3-2 Copy

  
• IUPAC Standard InChIKey: TXKMVPPZCYKFAC-UHFFFAOYSA-N Copy
• CAS Registry Number: 20901-21-7
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
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• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • Ion clustering data
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
  • Gas Phase Kinetics Database
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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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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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 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. 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

 +  = ( • )

By formula: F^- + OS₂ = (F^- • OS₂)

Vibrational and/or electronic energy levels

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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: Marilyn E. Jacox

State:   C

State:   a

State:   X

Additional references: Jacox, 1994, page 105; Jacox, 1998, page 199; Jacox, 2003, page 143; Cook, Winnewisser, et al., 1973; Tiemann, Hoeft, et al., 1974; Thorwirth, Theule, et al., 2006

Notes

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Vibrational and/or electronic energy levels, Notes

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

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Larson and McMahon, 1987
Larson, J.W.; McMahon, T.B., Trends in Gas Phase Fluoride Ion Affinities of the Main Group Oxyfluorides and Fluoride Sulfides. Fluoride Adducts of FAsO, FPO, FPO2, F2SiO, F4SO, FBO, F2SiS, FPS, FAsS, F2S2, and S2O., Inorg. Chem., 1987, 26, 24, 4018, https://doi.org/10.1021/ic00271a011 . [all data]

Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R., Bond dissociation energies of F2(-) and HF2(-). A gas-phase experimental and G2 theoretical study, J. Phys. Chem., 1995, 99, 7, 2002, https://doi.org/10.1021/j100007a034 . [all data]

Jones, 1950
Jones, A.V., Infra-Red and Ultraviolet Spectra of Sulphur Monoxide, J. Chem. Phys., 1950, 18, 9, 1263, https://doi.org/10.1063/1.1747922 . [all data]

Lakshminarayana, 1975
Lakshminarayana, G., Ultraviolet band systems of S2O, J. Mol. Spectrosc., 1975, 55, 1-3, 141, https://doi.org/10.1016/0022-2852(75)90259-3 . [all data]

Hallin, Merer, et al., 1977
Hallin, K.-E.J.; Merer, A.J.; Milton, D.J., Rotational analysis of bands of the 3400 Å system of disulphur monoxide (S, Can. J. Phys., 1977, 55, 21, 1858, https://doi.org/10.1139/p77-226 . [all data]

Chiu, Sung, et al., 1982
Chiu, C.L.; Sung, P.C.; Chen, L.D., Excitation and fluorescence spectra of disulfur monoxide, J. Mol. Spectrosc., 1982, 94, 2, 343, https://doi.org/10.1016/0022-2852(82)90010-8 . [all data]

Tsukiyama, Kobayashi, et al., 1984
Tsukiyama, K.; Kobayashi, D.; Obi, K.; Tanaka, I., The ultraviolet bands of S2O studied by LIF and optical-optical double-resonance spectroscopy, Chem. Phys., 1984, 84, 3, 337, https://doi.org/10.1016/0301-0104(84)85183-6 . [all data]

Clouthier and Rutherford, 1988
Clouthier, D.J.; Rutherford, M.L., Supersonic jet spectroscopy of S2O, Chem. Phys., 1988, 127, 1-3, 189, https://doi.org/10.1016/0301-0104(88)87117-9 . [all data]

Zhang, Dupre, et al., 1995
Zhang, Q.; Dupre, P.; Grzybowski, B.; Vaccaro, P.H., Laser-induced fluorescence studies of jet-cooled S2O: Axis-switching and predissociation effects, J. Chem. Phys., 1995, 103, 1, 67, https://doi.org/10.1063/1.469623 . [all data]

Muller, Vaccaro, et al., 1999
Muller, T.; Vaccaro, P.H.; Perez-Bernal, F.; Iachello, F., The vibronically-resolved emission spectrum of disulfur monoxide (S[sub 2]O): An algebraic calculation and quantitative interpretation of Franck--Condon transition intensities, J. Chem. Phys., 1999, 111, 11, 5038, https://doi.org/10.1063/1.479786 . [all data]

Phillips, Smith, et al., 1969
Phillips, L.F.; Smith, J.J.; Meyer, B., The ultraviolet spectra of matrix isolated disulfur monoxide and sulfur dioxide, J. Mol. Spectrosc., 1969, 29, 1-3, 230, https://doi.org/10.1016/0022-2852(69)90102-7 . [all data]

Dixon, Haner, et al., 1977
Dixon, R.N.; Haner, D.A.; Webster, C.R., Optoacoustic spectroscopy with a tunable cw dye laser: forbidden transitions in some unstable sulphur compounds, Chem. Phys., 1977, 22, 2, 199, https://doi.org/10.1016/0301-0104(77)87003-1 . [all data]

Clouthier, 1987
Clouthier, D.J., The visible absorption spectrum of S2O, J. Mol. Spectrosc., 1987, 124, 1, 179, https://doi.org/10.1016/0022-2852(87)90131-7 . [all data]

Blukis and Myers, 1965
Blukis, U.; Myers, R.J., Disulfur Monoxide. III. Its Infrared Spectrum and Thermodynamic Functions, J. Phys. Chem., 1965, 69, 4, 1154, https://doi.org/10.1021/j100888a011 . [all data]

Lindemayer and Jones, 1985
Lindemayer, J.; Jones, H., The diode-laser spectrum of the ν1 band of disulfur monoxide, J. Mol. Spectrosc., 1985, 112, 1, 71, https://doi.org/10.1016/0022-2852(85)90192-4 . [all data]

Hopkins, Daly, et al., 1975
Hopkins, A.G.; Daly, F.P.; Brown, C.W., Infrared spectra of matrix isolated disulfur monoxide isotopes, J. Phys. Chem., 1975, 79, 17, 1849, https://doi.org/10.1021/j100584a018 . [all data]

Tang and Brown, 1975
Tang, S.-Y.; Brown, C.W., Raman spectrum of matrix-isolated disulfur monoxide. Evidence for the formation of trisulfur and sulfurdioxide from disulfur monoxide, Inorg. Chem., 1975, 14, 11, 2856, https://doi.org/10.1021/ic50153a055 . [all data]

Lo, Wu, et al., 2002
Lo, W.-J.; Wu, Y.-J.; Lee, Y.-P., Isomers of S[sub 2]O: Infrared absorption spectra of cyclic S[sub 2]O in solid Ar, J. Chem. Phys., 2002, 117, 14, 6655, https://doi.org/10.1063/1.1506155 . [all data]

Meschi and Myers, 1959
Meschi, D.J.; Myers, R.J., The microwave spectrum, structure, and dipole moment of disulfur monoxide, J. Mol. Spectrosc., 1959, 3, 1-6, 405, https://doi.org/10.1016/0022-2852(59)90036-0 . [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, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [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]

Cook, Winnewisser, et al., 1973
Cook, R.L.; Winnewisser, G.; Lindsey, D.C., The centrifugal distortion constants of disulfur monoxide, J. Mol. Spectrosc., 1973, 46, 2, 276, https://doi.org/10.1016/0022-2852(73)90042-8 . [all data]

Tiemann, Hoeft, et al., 1974
Tiemann, E.; Hoeft, J.; Lovas, F.J.; Johnson, D.R., Spectroscopic studies of the SO2 discharge system. I. The microwave spectrum and structure of S2O, J. Chem. Phys., 1974, 60, 12, 5000, https://doi.org/10.1063/1.1681014 . [all data]

Thorwirth, Theule, et al., 2006
Thorwirth, S.; Theule, P.; Gottlieb, C.A.; Muller, H.S.P.; McCarthy, M.C.; Thaddeus, P., Rotational spectroscopy of S2O: Vibrational satellites, 33S isotopomers, and the sub-millimeter-wave spectrum, J. Mol. Struct., 2006, 795, 1-3, 219, https://doi.org/10.1016/j.molstruc.2006.02.055 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Vibrational and/or electronic energy levels, References

• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  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

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