کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5416680 | 1506914 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
CH acidity of five-membered nitrogen-containing heterocycles: DFT investigation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The CH acidity in gas phase and in THF and DMSO solution of 12 N-alkyl substituted azoles have been calculated with the density functional theory B3LYP method. The computed pKa values of azoles in THF solution and positions of deprotonation agree with experimentally found. The calculation results enabled us to explain a great difference in reactivity of 2-alkyltetrazoles comparing with 1-alkyltetrazoles in processes involving C-H bond cleavage (mercuration, iodination, aminomethylation). For studied compounds and corresponding anions three geometric aromaticity indices were calculated and Ï-electron delocalization was studied by means of natural bond orbital analysis. The results obtained were used to explain positions of deprotonation of azoles' molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure: THEOCHEM - Volume 909, Issues 1â3, 15 September 2009, Pages 19-24
Journal: Journal of Molecular Structure: THEOCHEM - Volume 909, Issues 1â3, 15 September 2009, Pages 19-24
نویسندگان
Vadim E. Matulis, Yury S. Halauko, Oleg A. Ivashkevich, Pavel N. Gaponik,