Heptasulfur
- Formula: S7
- Molecular weight: 224.455
- CAS Registry Number: 21459-04-1
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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
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 3.160 ± 0.050 | LPD | Hunsicker, Jones, et al., 1995 | Vertical Detachment Energy: 3.55 eV. An isomer exists with EA=2.26 eV; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.0 ± 0.2 | EI | Rosinger, Grade, et al., 1983 | LBLHLM |
| 8.7 ± 0.2 | EI | Drowart, Goldfinger, et al., 1968 | RDSH |
| 8.67 ± 0.03 | PI | Berkowitz and Lifshitz, 1968 | RDSH |
| 9.3 ± 0.3 | EI | Berkowitz and Chupka, 1964 | RDSH |
References
Go To: Top, 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.
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]
Drowart, Goldfinger, et al., 1968
Drowart, J.; Goldfinger, P.; Detry, D.; Rickert, H.; Keller, H.,
Mass spectrometric study of the equilibria in sulphur vapour generated by an electrochemical knudsen cell,
Advan. Mass Spectrom., 1968, 4, 499. [all data]
Berkowitz and Lifshitz, 1968
Berkowitz, J.; Lifshitz, C.,
Photoionization of high temperature vapors. II. Sulfur molecular species,
J. Chem. Phys., 1968, 48, 4346. [all data]
Berkowitz and Chupka, 1964
Berkowitz, J.; Chupka, W.A.,
Vaporization processes involving sulfur,
J. Chem. Phys., 1964, 40, 287. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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