Sulfur difluoride


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-70.901kcal/molReviewChase, 1998Data last reviewed in June, 1976
Quantity Value Units Method Reference Comment
gas,1 bar61.592cal/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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 1000.1000. to 6000.
A 8.07718013.86030
B 14.981000.029106
C -14.73570-0.006070
D 5.1693190.000430
E -0.056921-0.452906
F -74.04551-76.36611
G 67.1890176.30100
H -70.90019-70.90019
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1976 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 evaluated as indicated in comments:
L - Sharon G. Lias

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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to F2S+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)10.08eVN/AN/AL

Electron affinity determinations

EA (eV) Method Reference Comment
0.90 ± 0.70IMRBMiller, Miller, et al., 1995B
>3.10 ± 0.50EndoLangford, Almeida, et al., 1990B

Ionization energy determinations

IE (eV) Method Reference Comment
10.08PILosking and Willner, 1985LBLHLM
10.29 ± 0.10EIGombler, Haas, et al., 1980LLK
10.08PEDe Leeuw, Mooyman, et al., 1978LLK
10.29 ± 0.10EIHildenbrand, 1973LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
FS+13.95 ± 0.10FEIGombler, Haas, et al., 1980LLK
FS+~18.FEIDiLonardo and Trombetti, 1970RDSH

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]

Miller, Miller, et al., 1995
Miller, A.E.S.; Miller, T.M.; Viggiano, A.A.; Morris, R.A.; Vandoren, J.M.; Arnold, S.T.; Paulson, J., Negative ion chemistry of SF4, J. Chem. Phys., 1995, 102, 22, 8865, https://doi.org/10.1063/1.468940 . [all data]

Langford, Almeida, et al., 1990
Langford, M.L.; Almeida, D.P.; Harris, F.M., Measurements of single ionization energies or electron affinities of SFn molecules (n = 1-5) using double-charge-transfer spectroscopy, Int. J. Mass Spectrom. Ion Processes, 1990, 98, 147. [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]

Gombler, Haas, et al., 1980
Gombler, W.; Haas, A.; Willner, H., Chalkogenfluoride in niedrigen oxydationsstufen. V. Die ungewohnlichen chemischen gleichgewichte F3S-SF = 2 SF2 und CF3SF2-SCF3 = 2 CF3SF, Z. Anorg. Allg. Chem., 1980, 469, 135. [all data]

De Leeuw, Mooyman, et al., 1978
De Leeuw, D.M.; Mooyman, R.; De Lange, C.A., He(I) photoelectron spectroscopy of transient species: The SF2 molecule, Chem. Phys., 1978, 34, 287. [all data]

Hildenbrand, 1973
Hildenbrand, D.L., Mass spectrometric studies of some gaseous sulfur fluorides, J. Phys. Chem., 1973, 77, 897. [all data]

DiLonardo and Trombetti, 1970
DiLonardo, G.; Trombetti, A., Spectrum of SF, J. Chem. Soc. Faraday Trans., 1970, 66, 2694. [all data]


Notes

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