Cyclobutane, octafluoro-
- Formula: C4F8
- Molecular weight: 200.0300
- IUPAC Standard InChI: InChI=1S/C4F8/c5-1(6)2(7,8)4(11,12)3(1,9)10
- IUPAC Standard InChIKey: BCCOBQSFUDVTJQ-UHFFFAOYSA-N
- CAS Registry Number: 115-25-3
- 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: Cyclooctafluorobutane; Freon C 318; Freon 318; FC-C 318; Octafluorocyclobutane; Perfluorocyclobutane; Propellant C 318; R C318; Halocarbon C-138; UN 1976; Cyclobutane, 1,1,2,2,3,3,4,4-octafluoro-
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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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | Cm | Andreevskii and Antonova, 1982 | uncertain value: -361.0 kcal/mol | ||
| ΔfH°gas | -355.7 | kcal/mol | Ccb | Kolesov, Talakin, et al., 1968 | Correction of Kolesov, Talakin, et al., 1964 |
Condensed 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 by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°liquid | 69.57 | cal/mol*K | N/A | Furukawa, McCoskey, et al., 1954 |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 53.15 | 296.41 | Ponomareva, 1982 | T = 240 to 340 K. Value is unsmoothed experimental datum: Cp given as 1.112 J/g*K. |
| 50.136 | 268.52 | Furukawa, McCoskey, et al., 1954 | T = 17 to 270 K. Value is unsmoothed experimental datum. |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Andreevskii and Antonova, 1982
Andreevskii, D.N.; Antonova, Z.A.,
Development of an increment scheme for calculating the thermodynamic properties of organic polyfluoro compounds,
J. Appl. Chem. USSR, 1982, 55, 582-587. [all data]
Kolesov, Talakin, et al., 1968
Kolesov, V.P.; Talakin, O.G.; Skuratov, S.M.,
Enthalpy of formation of some specimens of amorphous carbon,
Russ. J. Phys. Chem. (Engl. Transl.), 1968, 42, 1218-1220. [all data]
Kolesov, Talakin, et al., 1964
Kolesov, V.P.; Talakin, O.G.; Skuratov, S.M.,
Standard enthalpy of formation of perfluorocyclobutane,
Russ. J. Phys. Chem. (Engl. Transl.), 1964, 38, 930-931. [all data]
Furukawa, McCoskey, et al., 1954
Furukawa, G.T.; McCoskey, R.E.; Reilly, M.L.,
Heat capacity, heats of transitions, fusion and vaporization, and vapor pressure of octafluorocyclobutane,
J. Res., 1954, NBS 52, 11-16. [all data]
Ponomareva, 1982
Ponomareva, O.P.,
Study of the isobaric heat capacity of Freon-113 and Freon-C318 in a broad range of parametric conditions, Teplofiz. Svoistva Veshchestv i Materialov,
Moskva, 1982, 16, 64-70. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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