期刊
CHEMICAL PHYSICS LETTERS
卷 502, 期 4-6, 页码 248-252出版社
ELSEVIER
DOI: 10.1016/j.cplett.2010.12.043
关键词
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资金
- Japan Science and Technology Agency (JST)
- Japan Society for the Promotion of Science (JSPS) [22685003]
- Grants-in-Aid for Scientific Research [22685003] Funding Source: KAKEN
have introduced a new computational method to provide an acid dissociation constant (pK(a)) value of an imino-proton in 5-substituted uracil. A linear fitting is applied to the experimentally observed pK(a) to compute the Gibbs energy difference of a deprotonation reaction by a conductor-like polarizable continuum model (CPCM)-B3LYP/aug-cc-pVDZ level of theory. Despite its simplicity in our method for evaluating pK(a), the error falls within 0.5 pK(a) units except for X = O (X: ligand of C5). The predicted pK(a) values for other 5-substituted uracils are also found to agree well with experimental data. (C) 2010 Elsevier B.V. All rights reserved.
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