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2-Butyl 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 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)

Quantity Value Units Method Reference Comment
Deltaf(+) ion766. ± 4.kJ/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
-0.129 ± 0.092D-EADePuy, Gronert, et al., 1989The HOF(Et(Me)N.) in Seetula, Russell, et al., 1990 gives BDE(N-H) = 99 kcal/mol, ca. 5 kcal/mol too strong; B

Ionization energy determinations

IE (eV) Method Reference Comment
7.25 ± 0.02PESchultz, Houle, et al., 1984LBLHLM
7.41 ± 0.05EILossing and Semeluk, 1970RDSH
7.59 ± 0.03PESchultz, Houle, et al., 1984Vertical 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.

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]

Seetula, Russell, et al., 1990
Seetula, J.A.; Russell, J.J.; Gutman, D., Kinetics and Thermochemistry of the Reactions of Alkyl Radicals with HI: A Reconciliation of the Alkyl Radical Heats of Formation, J. Am. Chem. Soc., 1990, 112, 4, 1347, https://doi.org/10.1021/ja00160a009 . [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]


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