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Benzene, (trifluoromethyl)-

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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 evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Quantity Value Units Method Reference Comment
IE (evaluated)9.685 ± 0.005eVN/AN/AL

Electron affinity determinations

EA (eV) Method Reference Comment
0.00221EFDDesfrancois, Abdoul-Carime, et al., 1994EA: 2.2 meV. Dipole-bound state.; B

Ionization energy determinations

IE (eV) Method Reference Comment
9.7PEPeel and Von Nagy-Felsobuki, 1987LBLHLM
9.69 ± 0.03PIBerman, Bomse, et al., 1981LLK
9.685 ± 0.004EQLias and Ausloos, 1978LLK
9.68PEBehan, Johnstone, et al., 1976LLK
9.68 ± 0.02PIWatanabe, Nakayama, et al., 1962RDSH
9.685 ± 0.005SHammond, Price, et al., 1950RDSH
9.86PEPeel and Von Nagy-Felsobuki, 1987Vertical value; LBLHLM

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C6H5+15.2 ± 0.1?EIMajer and Patrick, 1962RDSH
C6H5F+12.4 ± 0.1CF2PIBerman, Bomse, et al., 1981LLK

De-protonation reactions

C7H4F3- + Hydrogen cation = Benzene, (trifluoromethyl)-

By formula: C7H4F3- + H+ = C7H5F3

Quantity Value Units Method Reference Comment
Deltar1620. ± 10.kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.; B
Quantity Value Units Method Reference Comment
Deltar1584. ± 8.4kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.; B
Deltar1586. ± 21.kJ/molIMRBBartmess and McIver Jr., 1979gas phase; B


Go To: Top, Gas phase ion energetics data, Notes

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

Desfrancois, Abdoul-Carime, et al., 1994
Desfrancois, C.; Abdoul-Carime, H.; Khelifa, N.; Schermann, J.P., Fork 1/r to 1/r2 Potentials: Electron Exchange between Rydberg Atoms and Polar Molecules, Phys. Rev. Lett., 1994, 73, 18, 2436, https://doi.org/10.1103/PhysRevLett.73.2436 . [all data]

Peel and Von Nagy-Felsobuki, 1987
Peel, J.B.; Von Nagy-Felsobuki, E.I., The photoelectron spectra of the fluorotoluenes, J. Mol. Struct., 1987, 159, 195. [all data]

Berman, Bomse, et al., 1981
Berman, D.W.; Bomse, D.S.; Beauchamp, J.L., Photoionization threshold measurements for CF2 loss from perfluoropropylene, Perfluorocyclopropane, and trifluoromethylbenzene. The heat of formation of CF2 and the potential energy surface for C3F6 neutrals and ions, Int. J. Mass Spectrom. Ion Phys., 1981, 39, 263. [all data]

Lias and Ausloos, 1978
Lias, S.G.; Ausloos, P.J., eIonization energies of organic compounds by equilibrium measurements, J. Am. Chem. Soc., 1978, 100, 6027. [all data]

Behan, Johnstone, et al., 1976
Behan, J.M.; Johnstone, R.A.W.; Bentley, T.W., An evaluation of empirical methods for calculating the ionization potentials of substituted benzenes, Org. Mass Spectrom., 1976, 11, 207. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Hammond, Price, et al., 1950
Hammond, V.J.; Price, W.C.; Teegan, J.P.; Walsh, A.D., The absorption spectra of some substituted benzenes and naphthalenes in the vacuum ultra-violet, Faraday Discuss. Chem. Soc., 1950, 9, 53. [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]

Meot-ner and Kafafi, 1988
Meot-ner, M.; Kafafi, S.A., Carbon Acidities of Aromatic Compounds, J. Am. Chem. Soc., 1988, 110, 19, 6297, https://doi.org/10.1021/ja00227a003 . [all data]

Kiefer, Zhang, et al., 1997
Kiefer, J.H.; Zhang, Q.; Kern, R.D.; Yao, J.; Jursic, B., Pyrolysis of Aromatic Azines: Pyrazine, Pyrimidine, and Pyridine, J. Phys. Chem. A, 1997, 101, 38, 7061, https://doi.org/10.1021/jp970211z . [all data]

Bartmess and McIver Jr., 1979
Bartmess, J.E.; McIver Jr., The Gas Phase Acidity Scale in Gas Phase Ion Chemistry, Gas Phase Ion Chemistry, V. 2, M.T. Bowers, Ed., Academic Press, NY, 1979, Ch. 11, Elsevier, 1979. [all data]


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