Quantum-chemical study, IR spectra, and intramolecular hydrogen bonds in dimeric 5- and 6-methyluracils

被引:0
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作者
V. A. Naumov
M. A. Tafipol’skii
V. S. Reznik
机构
[1] Russian Academy of Sciences,Arbuzov Institute of Organic and Physical Chemistry, Kazan Research Center
[2] University of Augsburg,undefined
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Hydrogen; Hydrogen Bond; Comparative Analysis; Adenine; Force Constant;
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摘要
Comparative analysis of the geometry, atomic charges, force constants, and IR spectra of crystals of isomeric 5- and 6-methyluracils was performed by quantum-chemical methods. Dimeric and trimeric associates of C-methyluracil molecules and their dimers with adenine were calculated in order to estimate the energies of intramolecular hydrogen bonds. Thymine in DNA is impossible to replace by 6-methyluracillargely by steric reasons.
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页码:1926 / 1935
页数:9
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