کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5417094 | 1506906 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Systematic theoretical investigations on the tautomers of thymine in gas phase and solution
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The tautomers of thymine are systematically calculated using various methods. The order of the relative stability, dipole moment as well as solvent effect of the 13 isomers are investigated. The one-step transition process by proton transfer in gas phase and in solution (H2O or CH3OH), which acts as both proton donor and acceptor, are exhaustively studied, meanwhile, the internal rotation between two related isomers in the gas phase is also investigated. Furthermore, the energy barrier of each transition is calculated and the results show that both H2O and CH3OH could reduce the energy barrier. Comparisons between the activation energies of all the producing processes of each tautomer as well as temperature effect on the producing processes are made. The calculation results also indicated that the diketo is the most stable isomer both in gas phase and in solution, additionally, it is thermodynamically as well as dynamically favored.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure: THEOCHEM - Volume 939, Issues 1â3, 15 January 2010, Pages 106-111
Journal: Journal of Molecular Structure: THEOCHEM - Volume 939, Issues 1â3, 15 January 2010, Pages 106-111
نویسندگان
Ji-Cai Fan, Zhi-Cai Shang, Jun Liang, Xiu-Hong Liu, Hong Jin,