1,2,4-Trifluorobenzene

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Reaction 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 as indicated in comments:
B - John E. Bartmess
RCD - Robert C. Dunbar

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Individual Reactions

C6H2F3- + Hydrogen cation = 1,2,4-Trifluorobenzene

By formula: C6H2F3- + H+ = C6H3F3

Quantity Value Units Method Reference Comment
Δr1549. ± 8.8kJ/molG+TSBuker, Nibbering, et al., 1997gas phase; B
Quantity Value Units Method Reference Comment
Δr1517. ± 8.4kJ/molIMREBuker, Nibbering, et al., 1997gas phase; B

Chromium ion (1+) + 1,2,4-Trifluorobenzene = (Chromium ion (1+) • 1,2,4-Trifluorobenzene)

By formula: Cr+ + C6H3F3 = (Cr+ • C6H3F3)

Quantity Value Units Method Reference Comment
Δr125.kJ/molRAKRyzhov, 1999RCD

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:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
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
Proton affinity (review)729.5kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity699.4kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
9.304 ± 0.008EQLias and Ausloos, 1978LLK
9.30 ± 0.05PEClark and Frost, 1967RDSH
9.37PIBralsford, Harris, et al., 1960RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C6H3F2+15.2 ± 0.1FEIMajer and Patrick, 1962RDSH

De-protonation reactions

C6H2F3- + Hydrogen cation = 1,2,4-Trifluorobenzene

By formula: C6H2F3- + H+ = C6H3F3

Quantity Value Units Method Reference Comment
Δr1549. ± 8.8kJ/molG+TSBuker, Nibbering, et al., 1997gas phase; B
Quantity Value Units Method Reference Comment
Δr1517. ± 8.4kJ/molIMREBuker, Nibbering, et al., 1997gas phase; B

References

Go To: Top, Reaction thermochemistry data, 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.

Buker, Nibbering, et al., 1997
Buker, H.H.; Nibbering, N.M.M.; Espinosa, D.; Mongin, F.; Schlosser, M., Additivity of substituent effects in the fluoroarene series: Equilibrium acidity in the gas phase and deprotonation rates in ethereal solution, Tetrahed. Lett., 1997, 38, 49, 8519-8522, https://doi.org/10.1016/S0040-4039(97)10303-3 . [all data]

Ryzhov, 1999
Ryzhov, V., Binding Energies of Chromium Cations with Fluorobenzenes from Radiative Association Kinetics, Int. J. Mass Spectrom., 1999, 185/186/187, 913. [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]

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]

Clark and Frost, 1967
Clark, I.D.; Frost, D.C., A study of the energy levels in benzene and some fluorobenzenes by photoelectron spectroscopy, J. Am. Chem. Soc., 1967, 89, 244. [all data]

Bralsford, Harris, et al., 1960
Bralsford, R.; Harris, P.V.; Price, W.C., The effect of fluorine on the electronic spectra and ionization potentials of molecules, Proc. Roy. Soc. (London), 1960, A258, 459. [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]


Notes

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