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Tryptophan


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

Ionization energy determinations

IE (eV) Method Reference Comment
8.43CTSSlifkin and Allison, 1967RDSH
<=7.5EIAkopyan and Loginov, 1967RDSH

De-protonation reactions

L-Tryptophan anion + Hydrogen cation = Tryptophan

By formula: C11H11N2O2- + H+ = C11H12N2O2

Quantity Value Units Method Reference Comment
Deltar1421. ± 9.2kJ/molCIDCJones, Bernier, et al., 2007gas phase; B
Deltar1409. ± 13.kJ/molG+TSO'Hair, Bowie, et al., 1992gas phase; B
Quantity Value Units Method Reference Comment
Deltar1380. ± 13.kJ/molCIDCO'Hair, Bowie, et al., 1992gas phase; B

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.

Slifkin and Allison, 1967
Slifkin, M.A.; Allison, A.C., Measurement of ionization potentials from contact charge transfer spectra, Nature, 1967, 215, 949. [all data]

Akopyan and Loginov, 1967
Akopyan, M.E.; Loginov, Yy.V., Mass-spectrometric study of the phoionization of free «alpha»-aminoacids, High Energy Chem., 1967, 1, 83, In original 97. [all data]

Jones, Bernier, et al., 2007
Jones, C.M.; Bernier, M.; Carson, E.; Colyer, K.E.; Metz, R.; Pawlow, A.; Wischow, E.D.; Webb, I.; Andriole, E.J.; Poutsma, J.C., Gas-phase Acities of the 20 Protein Amino Acids, Int. J. Mass Spectrom., 2007, 267, 1-3, 54-62, https://doi.org/10.1016/j.ijms.2007.02.018 . [all data]

O'Hair, Bowie, et al., 1992
O'Hair, R.J.; Bowie, J.H.; Gronert, S., Gas Phase Acidity of the alpha-Amino Acids, Int. J. Mass Spectrom. Ion Proc., 1992, 117, 23, https://doi.org/10.1016/0168-1176(92)80083-D . [all data]


Notes

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