Benzene, pentafluoro-

• Formula: C₆HF₅
• Molecular weight: 168.0642
• IUPAC Standard InChI: InChI=1S/C6HF5/c7-2-1-3(8)5(10)6(11)4(2)9/h1H Copy

  
• IUPAC Standard InChIKey: WACNXHCZHTVBJM-UHFFFAOYSA-N Copy
• CAS Registry Number: 363-72-4
• 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: Pentafluorobenzene; 1,2,3,4,5-Pentafluorobenzene
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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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

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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - 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
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-βT_r) (1 − T_r)^β
    Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    T_r = reduced temperature (T / T_c)

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Antoine Equation Parameters

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

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Enthalpy of fusion

Entropy of fusion

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.

Cox, Gundry, et al., 1969
Cox, J.D.; Gundry, H.A.; Harrop, D.; Head, A.J., Thermodynamic properties of fluorine compounds. 9. Enthalpies of formation of some compounds containing the pentafluorophenyl group, J. Chem. Thermodyn., 1969, 1, 77-87. [all data]

Paukov and Lavrent'eva, 1969
Paukov, I.E.; Lavrent'eva, M.N., Thermodynamic properties of pentafluorobenzene over the range 12-300K, Zhur. Fiz. Khim., 1969, 43, 2938-2941. [all data]

Counsell, Hales, et al., 1968
Counsell, J.F.; Hales, J.L.; Martin, J.F., Thermodynamic properties of fluorine compounds. Part VI. The heat capacity and entropy of pentafluorobenzene, J. Chem. Soc. A, 1968, 2042-2044. [all data]

Paukov and Lavrent'eva, 1969, 2
Paukov, I.E.; Lavrent'eva, M.N., Thermodynamic properties of pentafluorobenzene over the range 12-300 K, Zh. Fiz. Khim., 1969, 43, 2938. [all data]

Counsell, Hales, et al., 1968, 2
Counsell, J.F.; Hales, J.L.; Martin, J.F., Thermodynamic properties of flourine compounds. Part VI. The heat capacity and entropy of pentafluorobenzene, J. Chem. Soc. A, 1968, 2042. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Skripov and Muratov, 1977
Skripov, V.P.; Muratov, G.N., The surface tensions of liquids and their interpretation by the method of thermodynamic similarity., Russ. J. Phys. Chem. (Engl. Transl.), 1977, 51, 806-8. [all data]

Hales and Townsend, 1974
Hales, J.L.; Townsend, R., Liquid Densities from 293 to 490 K of Eight Fluorinated Aromatic Comp., J. Chem. Thermodyn., 1974, 6, 111-6. [all data]

Ambrose and Sprake, 1971
Ambrose, D.; Sprake, C.H.S., Thermodynamic properties of fluorine compounds: x critical properties and vapour pressures of pentafluorobenzene, chloropentafluorobenzene, 2,3,4,5,6 -pentafluorotoluene, and pentafluorophenol, J. Chem. Soc. A, 1971, 1971, 1263. [all data]

Evans and Tiley, 1966
Evans, F.D.; Tiley, P.F., Vapour Pressures and Critical Constants of Hexafluoro, Pentafluoro-, Chloropentafrluoro-, and Bromopentafluoro-benzene, J. Chem. Soc. B, 1966, 1966, 134-6. [all data]

Invernizzi, 1982
Invernizzi, C., Termotecnica, 1982, 4, 78. [all data]

Basarová and Svoboda, 1991
Basarová, Pavlína; Svoboda, Václav, Calculation of heats of vaporization of halogenated hydrocarbons from saturated vapour pressure data, Fluid Phase Equilibria, 1991, 68, 13-34, https://doi.org/10.1016/0378-3812(91)85008-I . [all data]

Findlay, 1969
Findlay, T.J.V., Vapor pressures of fluorobenzenes from 5° to 50°C, J. Chem. Eng. Data, 1969, 14, 229. [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]

Ambrose, 1968
Ambrose, D., Thermodynamic properties of fluorine compounds. Part V. Vapour pressures of pentafluorobenzene, chloropentafluorobenzene, 2,3,4,5,6-pentafluorotoluene, and pentafluorophenol, J. Chem. Soc., A, 1968, 1381, https://doi.org/10.1039/j19680001381 . [all data]

Evans and Tiley, 1966, 2
Evans, F.D.; Tiley, P.F., Vapour pressures and critical constants of hexafluoro-, pentafluoro-, chloropentafluoro-, and bromopentafluoro-benzene, J. Chem. Soc., B:, 1966, 134, https://doi.org/10.1039/j29660000134 . [all data]

Patrick and Prosser, 1964
Patrick, C.R.; Prosser, G.S., Vapour pressures and related properties of hexafluorobenzene and of pentafluorobenzene, Trans. Faraday Soc., 1964, 60, 700, https://doi.org/10.1039/tf9646000700 . [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]

Ambrose, 1968, 2
Ambrose, D., Thermodynamic Properties of Fluorine Compounds. Part V. Vapour Pressures of Pentafluorobenzene, Chloropentafluorobenzene, 2,3,4,5,6-Pentafluorotoluene, and Pentafluorophenol, J. Chem. Soc. A:, 1968, 1381-1383, https://doi.org/10.1039/j19680001381 . [all data]

Evans and Tiley, 1966, 3
Evans, F.D.; Tiley, Vapour Pressures and Critical Constants of Hexafluoro-, Pentafluoro-, Chloropentafluoro-, and Bromopentafluoro-benzene, J. Chem. Soc. B:, 1966, 134-136, https://doi.org/10.1039/j29660000134 . [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [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
  Ttriple	Triple point temperature
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions
  ρc	Critical density

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