Ethane, pentafluoro-

• Formula: C₂HF₅
• Molecular weight: 120.0214
• IUPAC Standard InChI: InChI=1S/C2HF5/c3-1(4)2(5,6)7/h1H Copy

  
• IUPAC Standard InChIKey: GTLACDSXYULKMZ-UHFFFAOYSA-N Copy
• CAS Registry Number: 354-33-6
• 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: C2F5H; Pentafluoroethane; 1,1,1,2,2-Pentafluoroethane; Fc-125; Genetron HFC 125; R-125
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• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Fluid Properties
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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

Enthalpy of vaporization

Enthalpy of fusion

Gas phase ion energetics 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: John E. Bartmess

De-protonation reactions

C₂F₅^- +  =

By formula: C₂F₅^- + H⁺ = C₂HF₅

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.

Young, Fukuhara, et al., 1940
Young, D.W.S.; Fukuhara, N.; Bigelow, L.A., The Action of Elementary Fluorine Upon Organic Compounds VIII. The Influence of Dilution on the Vapor Phase Fluorination of Ethane, J. Am. Chem. Soc., 1940, 62, 1171. [all data]

Yata, Hori, et al., 1996
Yata, J.; Hori, M.; Kawakatsu, H.; Minamiyama, T., Measurements of refractive index of alternative refrigerants, Int. J. Thermophys., 1996, 17, 65-74. [all data]

Kuwabara, Aoyama, et al., 1995
Kuwabara, S.; Aoyama, H.; Sato, H.; Watanabe, K., Vapor-liquid coexistence curves in the critical region and the critical temperatures and densities of difluoromethane and pentafluoroehtane, J. Chem. Eng. Data, 1995, 40, 112-116. [all data]

Higashi, 1994
Higashi, Y., Critical parameters for HFC134a, HFC32 and HFC125, Int. J. Refrig., 1994, 17, 524-531. [all data]

Wilson, Wilding, et al., 1992
Wilson, L.C.; Wilding, W.V.; Wilson, G.M.; Rowley, R.L.; Felix, V.M.; Chisolm-Carter, T., Thermophysical properties of HFC-125, Fluid Phase Equilib., 1992, 80, 167-77. [all data]

Tsvetkov, Kletskii, et al., 1995
Tsvetkov, O.B.; Kletskii, A.V.; Laptev, Yu.A.; Asambaev, A.J.; Zausaev, I.A., Thermal conductivity and PVT measurements of pentafluoroethane ( refrigerant HFC-125), Int. J. Thermophys., 1995, 16, 1185-92. [all data]

Ye, Sato, et al., 1995
Ye, F.; Sato, H.; Watanabe, K., Gas-phase PVT properties and vapor pressure of pentafluoroethane (HFC-125) determined according to the burnett method, J. Chem. Eng. Data, 1995, 40, 148-152. [all data]

Sagawa, Sato, et al., 1994
Sagawa, T.; Sato, H.; Watanabe, K., Thermodynamic properties of HFC-125 based on (p,V,T) measurements, High Temp. - High Pressures, 1994, 26, 193-201. [all data]

Weber, 1999
Weber, F., Measurement of the specific enthalpy of vaporization of the alternative refrigerant pentafluoroethane in the temperature range from 175 K to 220 K, PTB-Mitteilungen, 1999, 109, 6, 469. [all data]

L«65533»ddecke and Magee, 1996
L«65533»ddecke, T.O.; Magee, J.W., Molar heat capacity at constant volume of difluoromethane (R32) and pentafluoroethane (R125) from the triple-point temperature to 345 K at pressures to 35 MPa, Int J Thermophys, 1996, 17, 4, 823-849, https://doi.org/10.1007/BF01439192 . [all data]

Sullivan and Beauchamp, 1976
Sullivan, S.A.; Beauchamp, J.L., Competition between proton transfer and elimination in the reactions of strong bases with fluoroethanes in the gas phase. Influence of base strength on reactivity, J. Am. Chem. Soc., 1976, 98, 1160. [all data]

Notes

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• Symbols used in this document:
  

  Pc	Critical pressure
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  ΔfusH	Enthalpy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ρc	Critical density

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