Thymidine
- Formula: C10H14N2O5
- Molecular weight: 242.2286
- IUPAC Standard InChIKey: IQFYYKKMVGJFEH-UHFFFAOYSA-N
- CAS Registry Number: 50-89-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: β-D-Ribofuranoside, thymine-1 2-deoxy-; Deoxythymidine; dT; DThyd; Thymidin; Thymine-2-Desoxyriboside; Thyminedeoxyriboside; Uridine, 2'-deoxy-5-methyl-; 2,4(1H,3H)-Pyrimidinedione, 1-(2-deoxy-β-D-erythro-pentofuranosyl)-5-methyl-; 2'-Deoxythymidine; 5-Methyldeoxyuridine; Deoxythymidin; 2,4(1H,3H)-Pyrimidinedione, 1-(2-deoxy-β-D-ribofuranosyl)-5-methyl-; 5-Methyldeoxyurindine; Thymine-2-deoxyriboside; Desoxy-thymidin; Thymidine, 2'-deoxy-; 1-(2-Deoxy-β-D-erythro-pentofuranosyl)-5-methyl-2,4(1H,3H)-pyrimidinedione; 5-Methyl-2'-deoxyuridine; NSC 21548
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, 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
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
C10H14N2O5- + =
By formula: C10H14N2O5- + H+ = C10H14N2O5
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 334.37 ± 0.41 | kcal/mol | CIDC | Kumari, Devi, et al., 2010 | gas phase; The entropy of acidity values from the kinetic method given, seem unreasonably small for the structures shown - JEB |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, References, Notes
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:
B - John E. Bartmess
MM - Michael M. Meot-Ner (Mautner)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 226.6 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 218.9 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.40 ± 0.10 | LPES | Stokes, Li, et al., 2007 | Vertical Detachment Energy: 0.89 eV; B |
Proton affinity at 298K
Proton affinity (kcal/mol) | Reference | Comment |
---|---|---|
218.5 | Mezzache, Alves, et al., 2005 | EKM using amino acid reference bases. ΔS(prot) relates to difference between transition states for dimer dissociation to yield protonated nucleotide or reference base, assummed to approximate the thermochemical ΔS(prot) of the nucleotide.; MM |
De-protonation reactions
C10H14N2O5- + =
By formula: C10H14N2O5- + H+ = C10H14N2O5
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 334.37 ± 0.41 | kcal/mol | CIDC | Kumari, Devi, et al., 2010 | gas phase; The entropy of acidity values from the kinetic method given, seem unreasonably small for the structures shown - JEB; B |
References
Go To: Top, Reaction thermochemistry data, 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.
Kumari, Devi, et al., 2010
Kumari, S.; Devi, C.L.; Prabhakar, S.; Bhanuprakash, K.; Vairaman, M.,
Estimation of Gas-Phase Acidities of Deoxyribonucleosides: An Experimental and Theoretical Study,
J. Am. Soc. Mass Spectrom., 2010, 21, 1, 136-143, https://doi.org/10.1016/j.jasms.2009.09.019
. [all data]
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]
Stokes, Li, et al., 2007
Stokes, S.T.; Li, X.; Grubisic, A.; Ko, Y.J.; Bowen, K.H.,
Intrinsic electrophilic properties of nucleosides: Photoelectron spectroscopy of their parent anions,
J. Chem. Phys., 2007, 127, 8, 084321, https://doi.org/10.1063/1.2774985
. [all data]
Mezzache, Alves, et al., 2005
Mezzache, S.; Alves, S.; Pepe, C.; Qualquejeu, M.; Fournier, F.; Valery, J.M.; Tabet, J.C.,
Proton affinity ladder for uridine and analogs: Influence of the hydroxyl group on the sugar ring conformation,
J. Mass Spectrom., 2005, 40, 722. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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