Tetrasulfur

• Formula: S₄
• Molecular weight: 128.260
• CAS Registry Number: 19269-85-3
• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Data at other public NIST sites:
  • 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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Gas phase ion energetics 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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to S₄⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

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:   A

State:   X

Additional references: Jacox, 1994, page 214; Jacox, 1998, page 260; McCarthy, Thorwirth, et al., 2004; Thorwirth, McCarthy, et al., 2005

Notes

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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]

Hunsicker, Jones, et al., 1995
Hunsicker, S.; Jones, R.O.; Gantefor, G., Rings and chains in sulfur cluster anions S- to S-9(-): Theory (simulated annealing) and experiment (photoelectron detachment), J. Chem. Phys., 1995, 102, 15, 5917, https://doi.org/10.1063/1.469326 . [all data]

Rosinger, Grade, et al., 1983
Rosinger, W.; Grade, M.; Hirschwald, W., Detection of ion states of S₂ to S₈ by electron impact, Int. J. Mass Spectrom. Ion Processes, 1983, 47, 239. [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]

Meyer, Oommen, et al., 1971
Meyer, B.; Oommen, T.V.; Jensen, D., Color of liquid sulfur, J. Phys. Chem., 1971, 75, 7, 912, https://doi.org/10.1021/j100677a012 . [all data]

Meyer, Stroyer-Hansen, et al., 1972
Meyer, B.; Stroyer-Hansen, T.; Oommen, T.V., The visible spectrum of S3 and S4, J. Mol. Spectrosc., 1972, 42, 2, 335, https://doi.org/10.1016/0022-2852(72)90089-6 . [all data]

Billmers and Smith, 1991
Billmers, R.I.; Smith, A.L., Ultraviolet-visible absorption spectra of equilibrium sulfur vapor: molar absorptivity spectra of S3 and S4, J. Phys. Chem., 1991, 95, 11, 4242, https://doi.org/10.1021/j100164a015 . [all data]

Hassanzadeh and Andrews, 1992
Hassanzadeh, P.; Andrews, L., Vibronic absorption spectra of sulfur (S3 and S4) in solid argon, J. Phys. Chem., 1992, 96, 16, 6579, https://doi.org/10.1021/j100195a015 . [all data]

Picquenard, Boumedien, et al., 1993
Picquenard, E.; Boumedien, M.S.; Corset, J., Resonance Raman spectra of the S4 molecule in the sulfur vapor, J. Mol. Struct., 1993, 293, 63, https://doi.org/10.1016/0022-2860(93)80015-N . [all data]

Meyer and Stroyer-Hansen, 1972
Meyer, B.; Stroyer-Hansen, T., Infrared spectra of S4, J. Phys. Chem., 1972, 76, 26, 3968, https://doi.org/10.1021/j100670a013 . [all data]

Brabson, Mielke, et al., 1991
Brabson, G.D.; Mielke, Z.; Andrews, L., Infrared spectra and structures of isotopically enriched sulfur (S3 and S4) in solid argon, J. Phys. Chem., 1991, 95, 1, 79, https://doi.org/10.1021/j100154a019 . [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]

McCarthy, Thorwirth, et al., 2004
McCarthy, M.C.; Thorwirth, S.; Gottlieb, C.A.; Thaddeus, P., Tetrasulfur, S[sub 4]: Rotational spectrum, interchange tunneling, and geometrical structure, J. Chem. Phys., 2004, 121, 2, 632, https://doi.org/10.1063/1.1769372 . [all data]

Thorwirth, McCarthy, et al., 2005
Thorwirth, S.; McCarthy, M.C.; Gottlieb, C.A.; Thaddeus, P.; Gupta, H.; Stanton, J.F., Rotational spectroscopy and equilibrium structures of S[sub 3] and S[sub 4], J. Chem. Phys., 2005, 123, 5, 054326, https://doi.org/10.1063/1.1942495 . [all data]

Notes

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• Symbols used in this document:
  

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

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