Difluorodisulfane


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.

Quantity Value Units Method Reference Comment
Δfgas-336.44kJ/molReviewChase, 1998Data last reviewed in June, 1976
Quantity Value Units Method Reference Comment
gas,1 bar293.98J/mol*KReviewChase, 1998Data last reviewed in June, 1976

Gas Phase Heat Capacity (Shomate Equation)

Cp° = 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
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 6000.
A 80.09975
B 2.575052
C -0.694205
D 0.059051
E -1.354278
F -364.9657
G 382.5569
H -336.4354
ReferenceChase, 1998
Comment Data last reviewed in June, 1976

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

IE (eV) Method Reference Comment
10.62 ± 0.02PILosking and Willner, 1985LBLHLM
11.6 ± 0.4EIWanczek, Lebert, et al., 1972LLK
10.68PEWagner, Bock, et al., 1973Vertical value; LLK
10.84PEWagner, Bock, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
FS+13.8 ± 0.1SFPILosking and Willner, 1985LBLHLM
FS2+12.24 ± 0.02FPILosking and Willner, 1985LBLHLM
FS2+14.0 ± 0.4?EIWanczek, Lebert, et al., 1972LLK
F2S+16.2 ± 0.4?EIWanczek, Lebert, et al., 1972LLK
S2+15.53 ± 0.072FPILosking and Willner, 1985LBLHLM
S2+17.6 ± 0.4?EIWanczek, Lebert, et al., 1972LLK

References

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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

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