Trifluoroacetic acid

• Formula: C₂HF₃O₂
• Molecular weight: 114.0233
• IUPAC Standard InChI: InChI=1S/C2HF3O2/c3-2(4,5)1(6)7/h(H,6,7) Copy

  
• IUPAC Standard InChIKey: DTQVDTLACAAQTR-UHFFFAOYSA-N Copy
• CAS Registry Number: 76-05-1
• 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: Acetic acid, trifluoro-; Perfluoroacetic acid; Trifluoroethanoic acid; CF3COOH; Kyselina trifluoroctova; Trifluoracetic acid; UN 2699; Acetic acid, 2,2,2-trifluoro-; NSC 77366
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to calorie-based units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Antoine Equation Parameters

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
MS - José A. Martinho Simões

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

C₂H₂F₃O₂⁺ +  = (C₂H₂F₃O₂⁺ • )

By formula: C₂H₂F₃O₂⁺ + C₂HF₃O₂ = (C₂H₂F₃O₂⁺ • C₂HF₃O₂)

Bond type: Hydrogen bonds of the type OH-O between organics

 +  =

By formula: C₂F₃O₂^- + H⁺ = C₂HF₃O₂

 +  =  + 

By formula: C₄F₆O₃ + C₅H₁₀O = C₇H₉F₃O₂ + C₂HF₃O₂

 +  =

By formula: C₇H₁₀ + C₂HF₃O₂ = C₉H₁₁F₃O₂

 +  =

By formula: C₇H₁₂ + C₂HF₃O₂ = C₉H₁₃F₃O₃

 +  =

By formula: C₆H₁₀ + C₂HF₃O₂ = C₈H₁₁F₃O₂

 +  =

By formula: C₅H₈ + C₂HF₃O₂ = C₇H₉F₃O₂

 +  =

By formula: C₇H₁₂ + C₂HF₃O₂ = C₉H₁₃F₃O₃

C₁₄H₁₀F₆MoO₄ (cr) + 2( • 4.40) (solution) = C₁₀H₁₀Cl₂Mo (cr) + 2 (l)

By formula: C₁₄H₁₀F₆MoO₄ (cr) + 2(HCl • 4.40H₂O) (solution) = C₁₀H₁₀Cl₂Mo (cr) + 2C₂HF₃O₂ (l)

C₁₄H₁₀F₆O₄Ti (cr) + 2( • 4.40) (solution) =  (cr) + 2 (l)

By formula: C₁₄H₁₀F₆O₄Ti (cr) + 2(HCl • 4.40H₂O) (solution) = C₁₀H₁₀Cl₂Ti (cr) + 2C₂HF₃O₂ (l)

C₁₄H₁₀F₆O₄W (cr) + 2( • 4.40) (solution) = C₁₀H₁₀Cl₂W (cr) + 2 (l)

By formula: C₁₄H₁₀F₆O₄W (cr) + 2(HCl • 4.40H₂O) (solution) = C₁₀H₁₀Cl₂W (cr) + 2C₂HF₃O₂ (l)

 +  =  + 

By formula: C₄F₆O₃ + C₇H₁₂O = C₉H₁₁F₃O₂ + C₂HF₃O₂

 +  =  + 

By formula: C₆H₁₂O + C₄F₆O₃ = C₈H₁₁F₃O₂ + C₂HF₃O₂

 +  =  + 

By formula: C₄F₆O₃ + C₅H₁₂O = C₇H₁₁F₃O₂ + C₂HF₃O₂

 +  =

By formula: C₂HF₃O₂ + C₆H₁₂ = C₈H₁₃F₃O₂

 +  =

By formula: C₂HF₃O₂ + C₆H₁₂ = C₈H₁₃F₃O₂

 +  =

By formula: C₆H₁₂ + C₂HF₃O₂ = C₈H₁₃F₃O₂

 +  =

By formula: C₆H₁₂ + C₂HF₃O₂ = C₈H₁₃F₃O₂

 +  =

By formula: C₆H₁₂ + C₂HF₃O₂ = C₈H₁₃F₃O₂

 +  =

By formula: C₆H₁₂ + C₂HF₃O₂ = C₈H₁₃F₃O₂

 +  =

By formula: C₅H₁₀ + C₂HF₃O₂ = C₇H₁₁F₃O₂

 +  =

By formula: C₅H₁₀ + C₂HF₃O₂ = C₇H₁₁F₃O₂

 +  =

By formula: C₂HF₃O₂ + C₆H₁₂ = C₈H₁₃F₃O₂

C₅H₁₁BrMg (solution) +  (solution) = C₂BrF₃MgO₂ (solution) +  (solution)

By formula: C₅H₁₁BrMg (solution) + C₂HF₃O₂ (solution) = C₂BrF₃MgO₂ (solution) + C₅H₁₂ (solution)

 +  =  + 

By formula: C₄F₆O₃ + C₆H₁₄O = C₂HF₃O₂ + C₈H₁₃F₃O₂

 +  =  + 

By formula: C₄F₆O₃ + C₆H₁₄O = C₂HF₃O₂ + C₈H₁₃F₃O₂

 +  = 2

By formula: C₄F₆O₃ + H₂O = 2C₂HF₃O₂

 +  = C₂F₃NO₄ + 

By formula: C₄F₆O₃ + HNO₃ = C₂F₃NO₄ + C₂HF₃O₂

Henry's Law data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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 by: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, IR Spectrum, 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

De-protonation reactions

 +  =

By formula: C₂F₃O₂^- + H⁺ = C₂HF₃O₂

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, 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 by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

C₂H₂F₃O₂⁺ +  = (C₂H₂F₃O₂⁺ • )

By formula: C₂H₂F₃O₂⁺ + C₂HF₃O₂ = (C₂H₂F₃O₂⁺ • C₂HF₃O₂)

Bond type: Hydrogen bonds of the type OH-O between organics

IR Spectrum

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Gas Phase Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, References, Notes

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

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Additional Data

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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.

Guthrie, 1976
Guthrie, J.P., Thermodynamics of ester and orthoester formation from trifluoroacetic acid, Can. J. Chem., 1976, 54, 202-209. [all data]

Kolesov, Slavutskaya, et al., 1972
Kolesov, V.P.; Slavutskaya, G.M.; Papina, T.S., Standard enthalpies of formation of perfluorodi-n-butyl ether and trifluoroacetic acid, Russ. J. Phys. Chem. (Engl. Transl.), 1972, 46, 474. [all data]

Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P., Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]

Kolesov and Zenkov, 1966
Kolesov, V.P.; Zenkov, I.D., Standard of enthalpy of formation of trifluoroacetic acid, Russ. J. Phys. Chem. (Engl. Transl.), 1966, 40, 743-744. [all data]

Farchan Laboratories, 1990
Farchan Laboratories, Research Chemicals Catalog, Farchan Laboratories, Gainesville, FL, 1990, 91. [all data]

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

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Malijevska, Sysova, et al., 1986
Malijevska, I.; Sysova, M.; Vlckova, D., Vapour-Liquid Equilibrium in Strongly Associated Systems. The Systems Acetic Acid-Propionic Acid and Acetic Acid-Trifluoroacetic Acid, Collect. Czech. Chem. Commun., 1986, 51, 194. [all data]

Parnes, Khotimskaya, et al., 1969
Parnes, Z.N.; Khotimskaya, G.A.; Kudryavtsev, R.V.; Lukina, M.Y.; Kursanov, D.N., The Behavior of Cyclopropane Hydrocarbons in Ionic Hydrogenation Reactions, Dokl. Akad. Nauk SSSR, Ser. Khim., 1969, 184, 615-8. [all data]

Kohler, Atrops, et al., 1981
Kohler, F.; Atrops, H.; Kalali, H.; Liebermann, E.; Wilhelm, E.; Ratkovics, F.; Salamon, T., Molecular Interactions in Mistures of Carboxylic Acids with Amines 1. Melting Curves adn Viscosities, J. Phys. Chem., 1981, 85, 2520-4. [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]

Kreglewski, 1962
Kreglewski, A., Bull. Pol. Acad. Sci., Ser. Sci. Chem., 1962, 10, 629. [all data]

Dykyj, 1970
Dykyj, J., Petrochemica, 1970, 10, 2, 51. [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]

Kreglewski, 1962, 2
Kreglewski, A., Vapour Pressures and Molar Volumes of Liquid Perfluoro-n-Octane Trifluoracetic Acid, and its Anhydride, Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1962, 10, 11-12, 629-633. [all data]

Larson and McMahon, 1982
Larson, J.W.; McMahon, T.B., Formation, Thermochemistry, and Relative Stabilities of Proton - Bound dimers of Oxygen n - Donor Bases from Ion Cyclotron Resonance Solvent - Exchange Equilibria Measurements, J. Am. Chem. Soc., 1982, 104, 23, 6255, https://doi.org/10.1021/ja00387a016 . [all data]

Cunningham, Payzant, et al., 1972
Cunningham, A.J.; Payzant, J.D.; Kebarle, P., A Kinetic Study of the Proton Hydrate H+(H2O)n Equilibria in the Gas Phase, J. Am. Chem. Soc., 1972, 94, 22, 7627, https://doi.org/10.1021/ja00777a003 . [all data]

Lias, Liebman, et al., 1984
Lias, S.G.; Liebman, J.F.; Levin, R.D., Evaluated gas phase basicities and proton affinities of molecules heats of formation of protonated molecules, J. Phys. Chem. Ref. Data, 1984, 13, 695. [all data]

Keesee and Castleman, 1986
Keesee, R.G.; Castleman, A.W., Jr., Thermochemical data on Ggs-phase ion-molecule association and clustering reactions, J. Phys. Chem. Ref. Data, 1986, 15, 1011. [all data]

Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P., Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria, Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092 . [all data]

Jinfeng, Topsom, et al., 1988
Jinfeng, C.; Topsom, R.D.; Headley, A.D.; Koppel, I.; Mishima, M.; Taft, R.W.; Veji, S., Acidities of Substituted Acetic Acids, J. Mol. Struct., 1988, 168, 141, https://doi.org/10.1016/0166-1280(88)80349-X . [all data]

Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P., Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A), Can. J. Chem., 1978, 56, 1. [all data]

Wiberg, Wasserman, et al., 1985
Wiberg, K.B.; Wasserman, D.J.; Martin, E.J.; Murcko, M.A., Enthalpies of hydration of alkenes. 3. Cycloalkenes, J. Am. Chem. Soc., 1985, 107, 6019-6022. [all data]

Calado, Dias, et al., 1981
Calado, J.C.G.; Dias, A.R.; Salema, M.S.; Martinho Simões, J.A., J. Chem. Soc., Dalton Trans., 1981, 1174.. [all data]

Calhorda, Carrondo, et al., 1986
Calhorda, M.J.; Carrondo, M.A.A.F.C.T.; Dias, A.R.; Domingos, A.M.T.S.; Martinho Simões, J.A.; Teixeira, C., Organometallics, 1986, 5, 660. [all data]

Wiberg and Hao, 1991
Wiberg, K.B.; Hao, S., Enthalpies of hydration of alkenes. 4. Formation of acyclic tert-alcohols, J. Org. Chem., 1991, 56, 5108-5110. [all data]

Wiberg and Wasserman, 1981
Wiberg, K.B.; Wasserman, D.J., Enthalpies of hydration of alkenes. 1. The n-hexenes, J. Am. Chem. Soc., 1981, 103, 6563-6566. [all data]

Holm, 1983
Holm, T., Acta Chem. Scand. B, 1983, 37, 797. [all data]

Tsvetkov, Shmakov, et al., 1989
Tsvetkov, V.G.; Shmakov, V.A.; Sopin, V.F.; Ivanov, A.V.; Ikonnikov, A.A.; Marchenko, G.N., Enthalpies of reaction of nitric acid with acetic and trifluoroacetic anhydrides, J. Gen. Chem. USSR, 1989, 59, 1220-1222. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Asbrink, Svensson, et al., 1981
Asbrink, L.; Svensson, A.; Von Niessen, W.; Bieri, G., 30.4 nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1981, 24, 293. [all data]

Sweigart and Turner, 1972
Sweigart, D.A.; Turner, D.W., Lone pair orbitals and their interactions studied by photoelectron spectroscopy. I. Carboxylic acids and their derivatives, J. Am. Chem. Soc., 1972, 94, 5592. [all data]

Carnovale, Gan, et al., 1980
Carnovale, F.; Gan, T.H.; Peel, J.B., Photoelectron spectroscopic studies of the monomers and dimers of acetic and trifluoracetic acids, J. Electron Spectrosc. Relat. Phenom., 1980, 20, 53. [all data]

Coleman, Green, et al., 1979
Coleman, A.W.; Green, J.C.; Hayes, A.J.; Seddon, E.A.; Lloyd, D.R.; Niwa, Y., A comparison of the electronic structure of some group 6A dimetal tetracarboxylates using photoelectron spectroscopy, J. Chem. Soc. Dalton Trans., 1979, 75, 1057. [all data]

Watanabe, Yokoyama, et al., 1973
Watanabe, I.; Yokoyama, Y.; Ikeda, S., Lone pair ionization potentials of carboxylic acids determined by He(I) photoelectron spectroscopy, Bull. Chem. Soc. Jpn., 1973, 46, 1959. [all data]

Thomas, 1972
Thomas, R.K., Photoelectron spectroscopy of hydrogen-bonded systems: spectra of monomers, dimers and mixed complexes of carboxylic acides, Proc. R. Soc. London A:, 1972, 331, 249. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  IE (evaluated)	Recommended ionization energy
  Tboil	Boiling point
  Tfus	Fusion (melting) point
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  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
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.