Isobutyl radical

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Gas phase 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.

Quantity Value Units Method Reference Comment
Δfgas70. ± 2.kJ/molN/ATsang, 1996 

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 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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to C4H9+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
0.05 ± 0.12D-EADePuy, Gronert, et al., 1989B

Ionization energy determinations

IE (eV) Method Reference Comment
7.93 ± 0.03PESchultz, Houle, et al., 1984LBLHLM
8.01 ± 0.05EILossing and Semeluk, 1970RDSH
8.31 ± 0.03PESchultz, Houle, et al., 1984Vertical value; LBLHLM

References

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

Tsang, 1996
Tsang, W., Heats of Formation of Organic Free Radicals by Kinetic Methods in Energetics of Organic Free Radicals, Martinho Simoes, J.A.; Greenberg, A.; Liebman, J.F., eds., Blackie Academic and Professional, London, 1996, 22-58. [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]

Schultz, Houle, et al., 1984
Schultz, J.C.; Houle, F.A.; Beauchamp, J.L., Photoelectron spectroscopy of 1-propyl, 1-butyl, isobutyl, neopentyl and 2-butyl radicals: Free radical precursors to high energy carbonium ion isomers, J. Am. Chem. Soc., 1984, 106, 3917. [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]


Notes

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