Difluorooxosilane
- Formula: F2OSi
- Molecular weight: 82.0817
- IUPAC Standard InChI: InChI=1S/F2OSi/c1-4(2)3
- IUPAC Standard InChIKey: KSMSUXMVDODGKV-UHFFFAOYSA-N
- CAS Registry Number: 14041-22-6
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Vibrational and/or electronic energy levels, 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°gas | -966.50 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1963 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 271.24 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1963 |
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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1100. | 1100. to 6000. |
|---|---|---|
| A | 32.40525 | 82.26748 |
| B | 112.8157 | 0.488829 |
| C | -97.95372 | -0.098780 |
| D | 30.69700 | 0.006834 |
| E | -0.397988 | -5.118915 |
| F | -981.7128 | -1005.076 |
| G | 278.6649 | 349.9360 |
| H | -966.5040 | -966.5040 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in September, 1963 | Data last reviewed in September, 1963 |
Vibrational and/or electronic energy levels
Go To: Top, Gas 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 by: Marilyn E. Jacox
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| a1 | 1 | Si=O stretch | 1309 | vs | Ar | IR | Schnockel, 1980 |
| 2 | SiF s-stretch | 835 | m | Ar | IR | Schnockel, 1980 | |
| 3 | SiF2 deform. | 423 | w m | Ar | IR | Schnockel, 1980 | |
| b1 | 4 | OPLA | 344 | s | Ar | IR | Schnockel, 1980 |
| b2 | 5 | SiF a-stretch | 996 | s | Ar | IR | Schnockel, 1980 |
| 6 | SiF2 rock | 333 | m | Ar | IR | Schnockel, 1980 | |
Additional references: Jacox, 1994, page 211
Notes
| w | Weak |
| m | Medium |
| s | Strong |
| vs | Very strong |
References
Go To: Top, Gas phase thermochemistry data, Vibrational and/or electronic energy levels, 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]
Schnockel, 1980
Schnockel, H.,
Matrixreaktion von SiO mit F2. IR-spektroskopischer nachweis von molekularem OSiF2,
J. Mol. Struct., 1980, 65, 115, https://doi.org/10.1016/0022-2860(80)85184-2
. [all data]
Jacox, 1994
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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