Difluorodisulfane

• Formula: F₂S₂
• Molecular weight: 102.127
• IUPAC Standard InChI: InChI=1S/F2S2/c1-3-4-2 Copy

  
• IUPAC Standard InChIKey: DKDSFVCSLPKNPV-UHFFFAOYSA-N Copy
• CAS Registry Number: 13709-35-8
• 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.
• Species with the same structure:
  • Difluoro disulphane
• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • 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
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

View reactions leading to F₂S₂⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

References

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

Losking and Willner, 1985
Losking, O.; Willner, H., Thermochemische daten und photoionisation-massenspektren von SSF₂, FSSF, SF₃SF und SF₃SSF, Z. Anorg. Allg. Chem., 1985, 530, 169. [all data]

Wanczek, Lebert, et al., 1972
Wanczek, K.-P.; Lebert, K.-H.; Hartmann, H., Untersuchung der Ion-Molekul-Reaktionen des Thiothionylfluorids mit Hilfe der Ionen-Cyclotronresonanz-Spektrometrie, Z. Naturforsch. A:, 1972, 27, 155. [all data]

Wagner, Bock, et al., 1973
Wagner, G.; Bock, H.; Budenz, R.; Seel, F., Photoelektronenspektren und Molekuleigenschaften. XIX. FSSF and SSF₂, Chem. Ber., 1973, 106, 1285. [all data]

Notes

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

• Symbols used in this document:
  

  AE	Appearance energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

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