L-Tyrosine anion
- Formula: C9H10NO3-
- Molecular weight: 180.1811
- IUPAC Standard InChI: InChI=1S/C9H11NO3/c10-8(9(12)13)5-6-1-3-7(11)4-2-6/h1-4,8,11H,5,10H2,(H,12,13)/p-1/t8-/m1/s1
- IUPAC Standard InChIKey: OUYCCCASQSFEME-MRVPVSSYSA-M
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Gas phase ion energetics data
Go To: Top, References, Notes
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
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 3.55 ± 0.10 | LPES | Tian, Wang, et al., 2009 | Vertical Detachment Energy: 3.90±0.10 eV. Actually EA of pOMe-C6H4CH2CH(NH2)CO2- |
Protonation reactions
+
=
By formula: C9H10NO3- + H+ = C9H11NO3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1425. ± 7.5 | kJ/mol | G+TS | Tian, Wang, et al., 2009 | gas phase; Probes indicate 70% phenoxide, 30% carboxylate (0.5 kcal/mol). dSacid calc at B3LYP, mixture of anions |
| ΔrH° | 1413. ± 11. | kJ/mol | CIDC | Jones, Bernier, et al., 2007 | gas phase |
| ΔrH° | 1413. ± 13. | kJ/mol | G+TS | O'Hair, Bowie, et al., 1992 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1391. ± 6.3 | kJ/mol | N/A | Tian, Wang, et al., 2009 | gas phase; Probes indicate 70% phenoxide, 30% carboxylate (0.5 kcal/mol). dSacid calc at B3LYP, mixture of anions |
| ΔrG° | 1379. ± 13. | kJ/mol | CIDC | O'Hair, Bowie, et al., 1992 | gas phase |
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.
Tian, Wang, et al., 2009
Tian, Z.X.; Wang, X.B.; Wang, L.S.; Kass, S.R.,
Are Carboxyl Groups the Most Acidic Sites in Amino Acids? Gas-Phase Acidities, Photoelectron Spectra, and Computations on Tyrosine, p-Hydroxybenzoic Acid, and Their Conjugate Bases,
J. Am. Chem. Soc., 2009, 131, 3, 1174-1181, https://doi.org/10.1021/ja807982k
. [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
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EAneutral Electron affinity of neutral species ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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