Tetrasulfur


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
gas,1 bar74.247cal/mol*KReviewChase, 1998Data last reviewed in September, 1977

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 6000.
A 19.09190
B 0.783077
C -0.000024
D 0.000002
E -0.281991
F -6.672871
G 95.53090
H 0.000000
ReferenceChase, 1998
Comment Data last reviewed in September, 1977

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

EA (eV) Method Reference Comment
2.220 ± 0.030LPDHunsicker, Jones, et al., 1995Vertical Detachment Energy: 2.42±0.05 eV); B

Ionization energy determinations

IE (eV) Method Reference Comment
10.1 ± 0.2EIRosinger, Grade, et al., 1983LBLHLM
10.4 ± 0.5EIHagemann, 1962RDSH

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]

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]


Notes

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