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.
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
  • Gas Phase Kinetics Database
• Options:
  • Switch to SI units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Gas phase thermochemistry data

Go To: Top, Gas phase ion energetics data, Ion clustering data, Vibrational and/or electronic energy levels, References, Notes

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.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

View table.

Gas phase ion energetics data

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

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

Data evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Electron affinity determinations

Ionization energy determinations

Appearance energy determinations

Ion clustering data

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

 +  = ( • )

By formula: F^- + OS₂ = (F^- • OS₂)

Vibrational and/or electronic energy levels

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

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]

Norwood and Ng, 1989
Norwood, K.; Ng, C.Y., Photoion-photoelectron coincidence spectroscopy of the transient molecules SO and S₂O, Chem. Phys. Lett., 1989, 156, 145. [all data]

Berkowitz, Eland, et al., 1977
Berkowitz, J.; Eland, J.H.D.; Appelman, E.H., Photoionization mass spectrometry and heat of formation of S₂O, J. Chem. Phys., 1977, 66, 2183. [all data]

Frost, Lee, et al., 1973
Frost, D.C.; Lee, S.T.; McDowell, C.A., The HeI photoelectron spectrum of S₂O, Chem. Phys. Lett., 1973, 22, 243. [all data]

Bock, Solouki, et al., 1973
Bock, H.; Solouki, B.; Rosmus, P.; Steudel, R., Photoelectron spectra and molecular properties: SSO and OSO, Angew. Chem. Int. Ed. Engl., 1973, 12, 933. [all data]

McDowell, 1972
McDowell, C.A., General disscussion, Faraday Discuss. Chem. Soc., 1972, 54, 68. [all data]

Hagemann, 1962
Hagemann, R., Determination de la chaleur de formation de S₂O par spectrometrie de masse, Compt. Rend., 1962, 255, 1102. [all data]

Rosmus, Dacre, et al., 1974
Rosmus, P.; Dacre, P.D.; Solouki, B.; Bock, H., Hartree-Fock calculations photoelectron spectra of SSO NSF, Theor. Chim. Acta, 1974, 35, 129. [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, Gas phase ion energetics data, Ion clustering data, Vibrational and/or electronic energy levels, References

• Symbols used in this document:
  

  AE	Appearance energy
  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  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
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.