Benzene, pentafluoro(trifluoromethyl)-

• Formula: C₇F₈
• Molecular weight: 236.0621
• IUPAC Standard InChI: InChI=1S/C7F8/c8-2-1(7(13,14)15)3(9)5(11)6(12)4(2)10 Copy

  
• IUPAC Standard InChIKey: USPWUOFNOTUBAD-UHFFFAOYSA-N Copy
• CAS Registry Number: 434-64-0
• 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: Toluene, octafluoro-; (Trifluoromethyl)pentafluorobenzene; Octafluorotoluene; Perfluorotoluene; Pentafluoro(trifluoro-methyl)benzene
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • IR Spectrum
  • UV/Visible spectrum
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to SI 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, 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry 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 as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Electron affinity determinations

Ionization energy determinations

Appearance energy determinations

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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:
B - John E. Bartmess
M - 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

 +  = ( • )

By formula: F^- + C₇F₈ = (F^- • C₇F₈)

Free energy of reaction

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Ion clustering data, 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, Gas phase ion energetics data, Ion clustering 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.

Stewart, 2004
Stewart, J.J.P., Comparison of the accuracy of semiempirical and some DFT methods for predicting heats of formation, J. Mol. Model, 2004, 10, 1, 6-10, https://doi.org/10.1007/s00894-003-0157-6 . [all data]

Krech, Price, et al., 1973
Krech, M.J.; Price, S.J.W.; Yared, W.F., Determination of the heat of formation of octafluorotoluene and calculation of D[C₆F₅-F] - D[C₆F₅-CF₃], Can. J. Chem., 1973, 51, 3662-3664. [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]

Dillow and Kebarle, 1989
Dillow, G.W.; Kebarle, P., Substituent Effects on the Electron Affinities of Perfluorobenzenes C₆F₅X, J. Am. Chem. Soc., 1989, 111, 15, 5592, https://doi.org/10.1021/ja00197a014 . [all data]

Lifshitz, Tiernan, et al., 1973
Lifshitz, C.; Tiernan, T.O.; Hughes, B.M., Electron affinities from endothermic negative-ion charge transfer reactions. IV. SF₆, selected fluorocarbons, and other polyatomic molecules, J. Chem. Phys., 1973, 59, 3182. [all data]

Holman, Kiplinger, et al., 1993
Holman, R.W.; Kiplinger, J.P.; Tuinman, A.A.; Bloor, J.E.; Bartmess, J.E., Structures of gas-phase C₇F₇⁺ ions, J. Am. Soc. Mass Spectrom., 1993, 4, 813. [all data]

Majer and Patrick, 1962
Majer, J.R.; Patrick, C.R., Electron impact on some halogenated aromatic compounds, J. Chem. Soc. Faraday Trans., 1962, 58, 17. [all data]

Furin, Zibarev, et al., 1989
Furin, G.G.; Zibarev, A.V.; Sultanov, A.Sh.; Furlei, I.I., Order and structure of the outer valence Mo's of some derivatives of pentafluorobenzene, Bull. Acad. Sci. USSR, Div. Chem. Sci., 1989, 4, 772. [all data]

Maier, Marthaler, et al., 1980
Maier, J.P.; Marthaler, O.; Mohraz, M., Decay of some substituted benzene cations in the B states in the gaseous phase, J. Chim. Phys., 1980, 77, 661. [all data]

Dillow and Kebarle, 1988
Dillow, G.W.; Kebarle, P., Fluoride Affinities of Perfluorobenzenes C₆F₅X. Meisenheimer Complexes in the Gas Phase and Solution, J. Am. Chem. Soc., 1988, 110, 15, 4877, https://doi.org/10.1021/ja00223a001 . [all data]

Hiraoka, Mizuse, et al., 1987
Hiraoka, K.; Mizuse, S.; Yamabe, S., A Determination of the Stability and Structure of F^-(C₆H₆) and F^-(C₆F₆) Clusters, J. Chem. Phys., 1987, 86, 7, 4102, https://doi.org/10.1063/1.451920 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  AE	Appearance energy
  EA	Electron affinity
  T	Temperature
  ΔfH°gas	Enthalpy of formation of gas 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

• 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.