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Isopropyl radical

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

Data compiled as indicated in comments:
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
B - John E. Bartmess

View reactions leading to C3H7+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)160.5kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity152.7kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Deltaf(+) ion191.5 ± 0.9kcal/molN/AN/A 
Quantity Value Units Method Reference Comment
DeltafH(+) ion,0K195.6 ± 0.9kcal/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
-0.320 ± 0.092D-EADePuy, Gronert, et al., 1989B
0.68949SIPage and Goode, 1969The Magnetron method, lacking mass analysis, is not considered reliable.; B

Ionization energy determinations

IE (eV) Method Reference Comment
7.37 ± 0.02PEDyke, Ellis, et al., 1985LBLHLM
7.36 ± 0.02PEHoule and Beauchamp, 1979LLK
7.55PEAue and Bowers, 1979LLK
7.55 ± 0.05EILossing and Semeluk, 1970RDSH
7.57 ± 0.05EIWilliams and Hamill, 1968RDSH
7.5 ± 0.1EIMelton and Hamill, 1964RDSH
<=7.5PIElder, Giese, et al., 1962RDSH
7.67 ± 0.02PEDyke, Ellis, et al., 1985Vertical value; LBLHLM


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.

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]

DePuy, Gronert, et al., 1989
DePuy, C.H.; Gronert, S.; Barlow, S.E.; Bierbaum, V.M.; Damrauer, R., The Gas Phase Acidities of the Alkanes, J. Am. Chem. Soc., 1989, 111, 6, 1968, https://doi.org/10.1021/ja00188a003 . [all data]

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

Dyke, Ellis, et al., 1985
Dyke, J.; Ellis, A.; Jonathan, N.; Morris, A., Vacuum ultraviolet photoelectron spectroscopy of transient species. Part 18. The cyclopropyl, isopropyl, an n-propyl radicals, J. Chem. Soc. Faraday Trans. 2, 1985, 81, 1573. [all data]

Houle and Beauchamp, 1979
Houle, F.A.; Beauchamp, J.L., Photoelectron spectroscopy of methyl, ethyl, isopropyl, and tert-butyl radicals. Implications for the thermochemistry and structures of the radicals and their corresponding carbonium ions, J. Am. Chem. Soc., 1979, 101, 4067. [all data]

Aue and Bowers, 1979
Aue, D.H.; Bowers, M.T., Chapter 9. Stabilities of positive ions from equilibrium gas phase basicity measurements in Ions Chemistry,, ed. M.T. Bowers, 1979. [all data]

Lossing and Semeluk, 1970
Lossing, F.P.; Semeluk, G.P., Free radicals by mass spectrometry. XLII.Ionization potentials and ionic heats of formation for C1-C4 alkyl radicals, Can. J. Chem., 1970, 48, 955. [all data]

Williams and Hamill, 1968
Williams, J.M.; Hamill, W.H., Ionization potentials of molecules and free radicals and appearance potentials by electron impact in the mass spectrometer, J. Chem. Phys., 1968, 49, 4467. [all data]

Melton and Hamill, 1964
Melton, C.E.; Hamill, W.H., Ionization potentials of alkyl free radicals and of benzene, toluene, and triethylamine by the RPD technique, J. Chem. Phys., 1964, 41, 3464. [all data]

Elder, Giese, et al., 1962
Elder, F.A.; Giese, C.; Steiner, B.; Inghram, M., Photo-ionization of alkyl free radicals, J. Chem. Phys., 1962, 36, 3292. [all data]


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