Carbonic difluoride
- Formula: CF2O
- Molecular weight: 66.0069
- IUPAC Standard InChI: InChI=1S/CF2O/c2-1(3)4
- IUPAC Standard InChIKey: IYRWEQXVUNLMAY-UHFFFAOYSA-N
- CAS Registry Number: 353-50-4
- 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: Carbonyl fluoride; Carbon difluoride oxide; Carbon fluoride oxide (COF2); Carbon oxyfluoride; Carbonyl difluoride; Difluoroformaldehyde; Fluoroformyl fluoride; Fluorophosgene; COF2; Fluophosgene; Difluorooxomethane; Difluorophosgene; Carbon fluoride oxide; Rcra waste number U033; UN 2417; Carbon oxyfluoride (COF2)
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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.
Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -638.90 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1969 |
| ΔfH°gas | -640.6 ± 5.9 | kJ/mol | Eqk | Amphlett, Dacey, et al., 1971 | Heat of Decomposition third law at 1200 K; ALS |
| ΔfH°gas | -639.9 ± 1.0 | kJ/mol | Ccr | Wartenberg, 1949 | Corrected for CODATA value of ΔfH; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 258.88 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1969 |
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 1000. | 1000. to 6000. |
|---|---|---|
| A | 17.38444 | 80.20644 |
| B | 134.4805 | 1.675530 |
| C | -112.4914 | -0.344860 |
| D | 35.15832 | 0.024211 |
| E | -0.103569 | -7.210580 |
| F | -649.4823 | -681.6113 |
| G | 243.9339 | 328.8193 |
| H | -638.8968 | -638.8968 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1969 | Data last reviewed in December, 1969 |
References
Go To: Top, Gas phase thermochemistry 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]
Amphlett, Dacey, et al., 1971
Amphlett, J.C.; Dacey, J.R.; Pritchard, G.O.,
An investigation of the reaction 2COF2 = CO2 + CF4 and the heat of formation of carbonyl fluoride,
J. Phys. Chem., 1971, 75, 3024-3026. [all data]
Wartenberg, 1949
Wartenberg, H.V.,
Die bildungswarme einiger fluorid,
Z. Anorg. Chem., 1949, 258, 354-360. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, 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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