L-Tryptophan anion


Reaction 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.

Data compiled by: John E. Bartmess

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Individual Reactions

L-Tryptophan anion + Hydrogen cation = Tryptophan

By formula: C11H11N2O2- + H+ = C11H12N2O2

Quantity Value Units Method Reference Comment
Δr1421. ± 9.2kJ/molCIDCJones, Bernier, et al., 2007gas phase
Δr1409. ± 13.kJ/molG+TSO'Hair, Bowie, et al., 1992gas phase
Quantity Value Units Method Reference Comment
Δr1380. ± 13.kJ/molCIDCO'Hair, Bowie, et al., 1992gas phase

L-Tryptophan anion + Water = C11H13N2O3-

By formula: C11H11N2O2- + H2O = C11H13N2O3-

Quantity Value Units Method Reference Comment
Δr61.9 ± 2.1kJ/molN/AWincel, 2008gas phase
Quantity Value Units Method Reference Comment
Δr28.9 ± 3.8kJ/molTDAsWincel, 2008gas phase

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.

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]

Wincel, 2008
Wincel, H., Hydration energies of deprotonated amino acids from gas phase equilibria measurements, J. Am. Soc. Mass Spectrom., 2008, 19, 8, 1091-1097, https://doi.org/10.1016/j.jasms.2008.05.014 . [all data]


Notes

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