Sulfur tetrafluoride
- Formula: F4S
- Molecular weight: 108.059
- IUPAC Standard InChIKey: QHMQWEPBXSHHLH-UHFFFAOYSA-N
- CAS Registry Number: 7783-60-0
- 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. - Other names: Sulfur fluoride (SF4), (T-4)-; Sulfur fluoride (SF4); Tetrafluorosulfurane; SF4; UN 2418; Sulfur fluoride; sulphur tetrafluoride
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Ion clustering 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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Clustering reactions
By formula: CN- + F4S = (CN- • F4S)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 25.8 ± 1.0 | kcal/mol | IMRE | Larson, Szulejko, et al., 1988 | gas phase; B,M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 30. | cal/mol*K | N/A | Larson, Szulejko, et al., 1988 | gas phase; switching reaction,Thermochemical ladder(CN-)H2O, Entropy change calculated or estimated; Payzant, Yamdagni, et al., 1971; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 16.90 ± 0.50 | kcal/mol | IMRE | Larson, Szulejko, et al., 1988 | gas phase; B,M |
By formula: F- + F4S = (F- • F4S)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 43.8 | kcal/mol | ICR | Larson and McMahon, 1985 | gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M |
ΔrH° | 43.8 | kcal/mol | ICR | Larson and McMahon, 1983 | gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 25. | cal/mol*K | N/A | Larson and McMahon, 1985 | gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M |
ΔrS° | 25.6 | cal/mol*K | N/A | Larson and McMahon, 1983 | gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 36.2 | kcal/mol | ICR | Larson and McMahon, 1985 | gas phase; switching reaction,Thermochemical ladder(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M |
ΔrG° | 36.2 | kcal/mol | ICR | Larson and McMahon, 1983 | gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M |
By formula: (F- • 4294967295F4S) + F4S = F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 54.9 ± 2.3 | kcal/mol | CIDT | Lobring, Check, et al., 2003 | gas phase; B |
ΔrH° | 54.1 ± 6.5 | kcal/mol | Ther | Leffert, Tang, et al., 1974 | gas phase; From SF6; B |
ΔrH° | >40.5 ± 3.4 | kcal/mol | IMRB | Babcock and Streit, 1981 | gas phase; Fluoride Affinity: SF4 > SF5; B |
ΔrH° | 43.8 ± 2.0 | kcal/mol | IMRE | Larson and McMahon, 1983 | gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 36.2 ± 2.0 | kcal/mol | IMRE | Larson and McMahon, 1983 | gas phase; These relative affinities are ca. 10 kcal/mol weaker than threshold values (see Wenthold and Squires, 1995) for donors greater than ca. 27 kcal/mol in free energy. This discrepancy has not yet been resolved, though the stronger value appears preferable.; B |
References
Go To: Top, Ion clustering data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Larson, Szulejko, et al., 1988
Larson, J.W.; Szulejko, J.E.; McMahon, T.B.,
Gas Phase Lewis Acid-Base Interactions. An Experimental Determination of Cyanide Binding Energies From Ion Cyclotron Resonance and High-Pressure Mass Spectrometric Equilibrium Measurements.,
J. Am. Chem. Soc., 1988, 110, 23, 7604, https://doi.org/10.1021/ja00231a004
. [all data]
Payzant, Yamdagni, et al., 1971
Payzant, J.D.; Yamdagni, R.; Kebarle, P.,
Hydration of CN-, NO2-, NO3-, and HO- in the gas phase,
Can. J. Chem., 1971, 49, 3308. [all data]
Larson and McMahon, 1985
Larson, J.W.; McMahon, T.B.,
Fluoride and chloride affinities of the main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ICR halide exchange equilibria,
J. Am. Chem. Soc., 1985, 107, 766. [all data]
Arshadi, Yamdagni, et al., 1970
Arshadi, M.; Yamdagni, R.; Kebarle, P.,
Hydration of Halide Negative Ions in the Gas Phase. II. Comparison of Hydration Energies for the Alkali Positive and Halide Negative Ions,
J. Phys. Chem., 1970, 74, 7, 1475, https://doi.org/10.1021/j100702a014
. [all data]
Larson and McMahon, 1983
Larson, J.W.; McMahon, T.B.,
Strong hydrogen bonding in gas-phase anions. An ion cyclotron resonance determination of fluoride binding energetics to bronsted acids from gas-phase fluoride exchange equilibria measurements,
J. Am. Chem. Soc., 1983, 105, 2944. [all data]
Lobring, Check, et al., 2003
Lobring, K.C.; Check, C.E.; Gilbert, T.M.; Sunderlin, L.S.,
New measurements of the thermochemistry of SF5- and SF6-,
Int. J. Mass Spectrom., 2003, 227, 3, 361-372, https://doi.org/10.1016/S1387-3806(03)00105-2
. [all data]
Leffert, Tang, et al., 1974
Leffert, C.B.; Tang, S.Y.; Rothe, E.W.; Cheng, T.C.,
Collisional ionization of Cs with SF6,
J. Chem. Phys., 1974, 61, 4929. [all data]
Babcock and Streit, 1981
Babcock, L.M.; Streit, G.E.,
Negative ion-molecule reactions of SF4,
J. Chem. Phys., 1981, 75, 3864. [all data]
Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R.,
Bond dissociation energies of F2(-) and HF2(-). A gas-phase experimental and G2 theoretical study,
J. Phys. Chem., 1995, 99, 7, 2002, https://doi.org/10.1021/j100007a034
. [all data]
Notes
Go To: Top, Ion clustering data, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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