Tungsten tetrafluoride oxide
- Formula: F4OW
- Molecular weight: 275.83
- CAS Registry Number: 13520-79-1
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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 |
|---|---|---|---|---|---|
| ΔfH°gas | -319.460 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 79.995 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1971 |
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) | 1000. to 6000. |
|---|---|
| A | 31.67189 |
| B | 0.071494 |
| C | -0.014894 |
| D | 0.001055 |
| E | -1.199060 |
| F | -332.4771 |
| G | 112.7430 |
| H | -319.4601 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1971 |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, References, Notes
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 |
|---|---|---|---|---|---|
| ΔfH°liquid | -335.865 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 42.761 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -336.260 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1971 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 42.008 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1971 |
Liquid 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) | 379. to 1000. |
|---|---|
| A | 43.50000 |
| B | 3.578120×10-9 |
| C | -4.182890×10-9 |
| D | 1.644370×10-9 |
| E | 3.042981×10-11 |
| F | -348.8339 |
| G | 95.40361 |
| H | -335.8640 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1971 |
Solid 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 379. |
|---|---|
| A | -8.068841 |
| B | 152.3010 |
| C | -146.9850 |
| D | 49.51231 |
| E | 0.563715 |
| F | -337.5289 |
| G | -3.899250 |
| H | -336.2591 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1971 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References, Notes
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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 13.6 | PE | Vovna, Dudin, et al., 1981 | LLK |
| 14.24 | PE | Vovna, Dudin, et al., 1981 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| F3OW+ | 16.6 ± 0.5 | F | EI | Malkerova, Mel'nichenko, et al., 1981 | LLK |
| WOF3+ | 14.6 ± 0.5 | F | EI | Zmbov, Uy, et al., 1969 | RDSH |
| WF3+ | 22.8 ± 1.0 | ? | EI | Zmbov, Uy, et al., 1969 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Vovna, Dudin, et al., 1981
Vovna, V.I.; Dudin, A.S.; Kleshchevnikov, A.M.; Lopatin, S.N.; Rakov, E.G.,
Photoelectron spectra and electronic structure of molybdenum, tungsten, rhonium, and osmium oxotetrafluorides,
Koord. Khim., 1981, 7, 575. [all data]
Malkerova, Mel'nichenko, et al., 1981
Malkerova, I.P.; Mel'nichenko, E.I.; Alikhanvan, E.G.; Gorgoraki, V.I.,
Thermal decomposition of the tungsten oxide fluorides W2O4FO2(NOF) and W2O4F,
Russ. J. Inorg. Chem., 1981, 26, 17. [all data]
Zmbov, Uy, et al., 1969
Zmbov, K.F.; Uy, O.M.; Margrave, J.L.,
Mass spectrometric studies at high temperatures. XXXI. Stabilities of tungsten and molybdenum oxyfluorides,
J. Phys. Chem., 1969, 73, 3008. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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