Ethane, 1,1,1-trifluoro-

• Formula: C₂H₃F₃
• Molecular weight: 84.0404
• IUPAC Standard InChI: InChI=1S/C2H3F3/c1-2(3,4)5/h1H3 Copy

  
• IUPAC Standard InChIKey: UJPMYEOUBPIPHQ-UHFFFAOYSA-N Copy
• CAS Registry Number: 420-46-2
• 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: Methylfluoroform; 1,1,1-Trifluoroethane; CH3CF3; Freon 143a; FC 143a; Fluorocarbon FC143a; R 143a; 1,1,1-Trifluoroform
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Gas Chromatography
  • Fluid Properties
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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 fusion

Enthalpy of phase transition

Entropy of phase transition

Gas phase ion energetics data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), References, Notes

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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

Appearance energy determinations

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), Notes

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

Russell, Golding, et al., 1944
Russell, H., Jr.; Golding, D.R.V.; Yost, D.M., The heat capacity, heats of transition, fusion and vaporization, vapor pressure and entropy of 1,1,1-trifluoroethane, J. Am. Chem. Soc., 1944, 66, 16-20. [all data]

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

Henne and Renoll, 1936
Henne, A.L.; Renoll, M.W., J. Am. Chem. Soc., 1936, 58, 889. [all data]

Russell, Golding, et al., 1944, 2
Russell, H.K.; Golding, D.R.; Yost, D.M., The heat capacity, heat of transition, fusion & vaporization, Vapor press. and entropy of 1,1,1-trifluoroethane, J. Am. Chem. Soc., 1944, 66, 16. [all data]

Fujiwara, Nakamura, et al., 1998
Fujiwara, K.; Nakamura, S.; Noguchi, M., Critical Parameters and Vapor Pressure Measurements for 1,1,1-Trifluoroethane (R-143a), J. Chem. Eng. Data, 1998, 43, 55-9. [all data]

Aoyama, Kishizawa, et al., 1996
Aoyama, H.; Kishizawa, G.; Sato, H.; Watanabe, K., Vapor-Liquid Coexistence Curves in the Critical Region and the Critical Temperatures and Densities of 1,1,1,2-Tetrafluoroethane (R-134a), 1,1,1- Trifluoroethane (R-143a), and 1,1,1,2,3,3- Hexafluorop, J. Chem. Eng. Data, 1996, 41, 1046-1051. [all data]

Fukushima, 1993
Fukushima, M., Measurements of vapor pressure , vapor-liquid coexistence curve and critical parameters of HFC-143a, Nippon Reito Kyokai Ronbunshu, 1993, 10, 87-93. [all data]

Mears, Stahl, et al., 1955
Mears, W.H.; Stahl, R.F.; Orfeo, S.R.; Shair, R.C.; Kells, L.F.; Thompson, W.; McCann, H., Thermodynamic Properties of Halogenated Ethanes and Ethylenes, Ind. Eng. Chem., 1955, 47, 1449. [all data]

Zhang, Sato, et al., 1995
Zhang, H.-L.; Sato, H.; Watanabe, K., Vapor Pressures, Gas-Phase PVT Properties, and Second Virial Coefficients for 1,1,1-Trifluoroethane, J. Chem. Eng. Data, 1995, 40, 887-90. [all data]

Weber and Defibaugh, 1996
Weber, L.A.; Defibaugh, D.R., Vapor Pressures and PVT Properties of the Gas Phase of 1,1,1-Trifluoroethane, J. Chem. Eng. Data, 1996, 41, 6, 1477-1480, https://doi.org/10.1021/je9602071 . [all data]

Mears, Stahl, et al., 1955, 2
Mears, Whitney H.; Stahl, Richard F.; Orfeo, S. Robert; Shair, Robert C.; Kells, Lyman F.; Thompson, Walter; McCann, Harold, Thermodynamic Properties of Halogenated Ethanes and Ethylenes, Ind. Eng. Chem., 1955, 47, 7, 1449-1454, https://doi.org/10.1021/ie50547a052 . [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]

Simmie and Tschuikow-Roux, 1971
Simmie, J.M.; Tschuikow-Roux, E., Mass spectrum, appearance potentials and bond dissociation energies of 1,1,1-trifluoroethane, Int. J. Mass Spectrom. Ion Phys., 1971, 7, 41. [all data]

Sauvageau, Doucet, et al., 1974
Sauvageau, P.; Doucet, J.; Gilbert, R.; Sandorfy, C., Vacuum ultraviolet and photoelectron spectra of fluoroethanes, J. Chem. Phys., 1974, 61, 391. [all data]

Gol'denfel'd, Korostyshevskii, et al., 1973
Gol'denfel'd, I.V.; Korostyshevskii, I.Z.; Mischanchuk, B.G.; Pokrovskii, V.A., Determination of ionization potentials of atoms and molecules using a field mass spectrometer equipped with an energy analyzer, Dokl. Akad. Nauk SSSR, 1973, 213, 626. [all data]

Loguinov, Takhistov, et al., 1981
Loguinov, Y.; Takhistov, V.V.; Vatlina, L.P., Photoionization studies of substituted trimethylamines, Org. Mass Spectrom., 1981, 16, 239. [all data]

Steele and Stone, 1962
Steele, W.C.; Stone, F.G.A., An electron impact study of 1,1,1-trifluoroethane, 1,1,1-trifluoropropane and 3,3,3-trifluoropropene, J. Am. Chem. Soc., 1962, 84, 3450. [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  AE	Appearance energy
  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
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔfusH	Enthalpy of fusion
  ΔvapH	Enthalpy of vaporization
  ΔvapS	Entropy of vaporization
  ρc	Critical density

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