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Methyl isobutyrate

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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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
LL - Sharon G. Lias and Joel F. Liebman

Quantity Value Units Method Reference Comment
Proton affinity (review)836.6kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity805.7kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
9.86PEBurgers, Holmes, et al., 1983LBLHLM
9.98 ± 0.02PIWatanabe, Nakayama, et al., 1962RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C2H3O2+11.42C3H7EIHolmes, Lossing, et al., 1991LL
C4H7O2+10.28CH3EIBurgers, Holmes, et al., 1983LBLHLM

References

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]

Burgers, Holmes, et al., 1983
Burgers, P.C.; Holmes, J.L.; Lossing, F.P.; Povel, F.R.; Terlouw, J.K., The role of charge-site location in fragmenting ions. 1- [CH3CHXCOOCH3]+ and [CH2XCH2COOCH3]+ ions and the structures of daughter ions derived from the loss of X (X = I, Br, Cl and CH3), Org. Mass Spectrom., 1983, 18, 335. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Holmes, Lossing, et al., 1991
Holmes, J.L.; Lossing, F.P.; Mayer, P.M., Heats of formation of oxygen-containing organic free radicals from appearance energy measurements, J. Am. Chem. Soc., 1991, 113, 9723. [all data]


Notes

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