Pentafluoro ethyl radical

Formula: C₂F₅
Molecular weight: 119.0134
IUPAC Standard InChI: InChI=1S/C2F5/c3-1(4)2(5,6)7
IUPAC Standard InChIKey: IBPHXKCFBXEFQP-UHFFFAOYSA-N
CAS Registry Number: 3369-48-0
Chemical structure:
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Gas phase ion energetics data

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Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to C₂F₅⁺ (ion structure unspecified)

Electron affinity determinations

EA (eV)	Method	Reference	Comment
1.81 ± 0.15	D-EA	Sullivan and Beauchamp, 1976	Between tBuOH and HF; value altered from reference due to change in acidity scale; B
1.90 ± 0.20	EIAE	Spyrou, Sauers, et al., 1983	From C2F6, relative to F- appearance energy; B
2.20 ± 0.30	EIAE	Harland and Thynne, 1973	From n-C₄F₁₀. G3MP2B3 calculations indicate an EA of ca.1.9 eV, and HOF(A-) of -260 kcal/mol; B
2.10 ± 0.20	EIAE	Harland and Thynne, 1972	From C₃F₈.; B
2.2983	EIAE	Lifshitz and Grajower, 1969	From C₃F₈.; B
2.39999	EIAE	MacNeil and Thynne, 1969	From C₂F₆; B
>3.29997	EIAE	Bibby and Carter, 1963	From C₃F₈.; B
>2.15 ± 0.30	SI	Page and Goode, 1969	The Magnetron method, lacking mass analysis, is not considered reliable.; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
10. ± 0.1	EI	Fisher, Homer, et al., 1965	RDSH

References

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

Sullivan and Beauchamp, 1976
Sullivan, S.A.; Beauchamp, J.L., Competition between proton transfer and elimination in the reactions of strong bases with fluoroethanes in the gas phase. Influence of base strength on reactivity, J. Am. Chem. Soc., 1976, 98, 1160. [all data]

Spyrou, Sauers, et al., 1983
Spyrou, S.M.; Sauers, I.; Christophorou, L.G., Electron attachment to the perfluoroalkanes n-CnF₂n⁺₂ (n = 1-6) and i-C₄F₁₀, J. Chem. Phys., 1983, 78, 7200. [all data]

Harland and Thynne, 1973
Harland, P.W.; Thynne, J.C.J., Negative ion formation by perfluoro-n-butane as the result of low energy electron impact, Int. J. Mass Spectrom. Ion Phys., 1973, 11, 445. [all data]

Harland and Thynne, 1972
Harland, P.W.; Thynne, J.C.J., Dissociative electron capture in perfluoropropylene and perfluoropropane, Int. J. Mass Spectrom. Ion Phys., 1972, 9, 253. [all data]

Lifshitz and Grajower, 1969
Lifshitz, C.; Grajower, R., Dissociative electron capture and dissociative ionization in perfluoropropane, Intern. J. Mass Spectrom. Ion Phys., 1969, 3, 211. [all data]

MacNeil and Thynne, 1969
MacNeil, K.A.G.; Thynne, J.C.J., Ionization and Dissociation of Hexafluoroethane, and of 1,1,1-Trifluoroethane and Fluoroform, by Electron Impact, Int. J. Mass Spectrom. Ion Phys., 1969, 2, 1, 1, https://doi.org/10.1016/0020-7381(69)80001-X . [all data]

Bibby and Carter, 1963
Bibby, M.M.; Carter, G., Ionization and dissociation in some fluorocarbon gases, J. Chem. Soc. Faraday Trans., 1963, 59, 2455. [all data]

Page and Goode, 1969
Page, F.M.; Goode, G.C., Negative Ions and the Magnetron., Wiley, NY, 1969. [all data]

Fisher, Homer, et al., 1965
Fisher, I.P.; Homer, J.B.; Lossing, F.P., Free radicals by mass spectrometry. XXXIII. Ionization potentials of CF₂, CF₃CF₂, CF₃CH₂, n-C₃F₇, and i-C₃F₇ radicals, J. Am. Chem. Soc., 1965, 87, 957. [all data]

Notes

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Symbols used in this document:

EA Electron affinity
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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