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L-Tryptophan

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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:
MM - Michael M. Meot-Ner (Mautner)

Quantity Value Units Method Reference Comment
Proton affinity (review)226.8kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity219.kcal/molN/AHunter and Lias, 1998HL

Proton affinity at 298K

Proton affinity (kcal/mol) Reference Comment
221.6Mirza, Prabhakar, et al., 2001T = T(eff) = 405-628K; Amino acids used as reference compounds. T(eff) at collision energies of 20 - 60 eV are 405-628 K.; MM
226.0Bojesen and Breindahl, 1994PA increased by 2.5 kcal/mol for referencing values to Hunter and Lias, 1998; MM

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.

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]

Mirza, Prabhakar, et al., 2001
Mirza, S.P.; Prabhakar, S.; Vairamani, M., Estimation of proton affinity of proline and tryptophan under electrospray ionization conditions using the extended kinetic method, Rapid Comm. Mass Spectrometry, 2001, 15, 957. [all data]

Bojesen and Breindahl, 1994
Bojesen, G.; Breindahl, T., On the Proton Affinity od Some Alpha-Amino Acids and the Theory of the Kinetic Method., J. Chem. Soc. Perkin 2, 1994, 1029. [all data]


Notes

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