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 Copy

  
• IUPAC Standard InChIKey: BCCOBQSFUDVTJQ-UHFFFAOYSA-N Copy
• 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
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• 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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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
  • Fluid Properties
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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

Constant pressure heat capacity of liquid

Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Entropy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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Enthalpy of phase transition

Entropy of phase transition

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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]

PCR Inc., 1990
PCR Inc., Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [all data]

Krauss and Stephan, 1989
Krauss, R.; Stephan, K., Thermal Conductivity of Refrigerants in a Wide Range of Temperature and Pressure, J. Phys. Chem. Ref. Data, 1989, 18, 43. [all data]

Park, Benning, et al., 1947
Park, J.D.; Benning, A.F.; Downing, F.B.; Laucius, J.F.; McHarness, R.C., Synthesis of Tetrafluoroethylene. Pyrolysis of Monochlorodifluoromethane, Ind. Eng. Chem., 1947, 39, 343-8. [all data]

Furukawa, McCoskey, et al., 1954, 2
Furukawa, G.T.; McCoskey, R.E.; Reilly, M.L., Heat capacity, heats of transitions, fusion, and vaporization, and vapor pressure of octafluorocyclobutane, J. RES. NATL. BUR. STAN., 1954, 52, 1, 11, https://doi.org/10.6028/jres.052.003 . [all data]

Mousa, Kay, et al., 1972
Mousa, A.H.N.; Kay, W.B.; Kreglewski, A., The critical constants of binary mixtures of certain perfluoro-compounds with alkanes, J. Chem. Thermodyn., 1972, 4, 301-11. [all data]

Douslin, Moore, et al., 1959
Douslin, D.R.; Moore, R.T.; Waddington, G., The pressure-volume-temperature properties of perfluorocyclobutane: equations of state, viral coefficients and intermolecular potential energy functions, J. Phys. Chem., 1959, 63, 1959. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Kletskii and Petrik, 1967
Kletskii, A.V.; Petrik, L.E., Zh. Fiz. Khim., 1967, 41, 5, 1183. [all data]

Martin, 1962
Martin, J.J., Thermodynamic Properties of Perfluorocyclobutane., J. Chem. Eng. Data, 1962, 7, 1, 68-72, https://doi.org/10.1021/je60012a020 . [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]

Kletskii and Petric, 1967
Kletskii, A.B.; Petric, L.E., Dependence of Vapor Pressure of Perfluorocyclobutane, Zh. Fiz. Khim., 1967, 41, 1183-1184. [all data]

Notes

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• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Pc	Critical pressure
  S°liquid	Entropy of liquid at standard conditions
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Vc	Critical volume
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔvapH	Enthalpy of vaporization
  ΔvapS	Entropy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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