Вид документа : Статья из журнала Шифр издания : 54/R 30 Автор(ы) : Alekseev S. G., Torgashev P. A., Fedotov M. A., Rezvukhin A. I., Shorshnev S. V., Belik A. V., Charushin V. N., Chupakhin O. N. Заглавие : Reactions of azinium cations. 8. Electron structures of 3-substituted 1,2,4-triazines and protonation, quaternization, and reactions with nucleophiles [Электронный ресурс] Место публикации : Chemistry of Heterocyclic Compounds. - 1988. - Vol. 24, № 4. - С. 434-441 Систем. требования: http://link.springer.com/article/10.1007/BF00478865 Примечания : Bibliogr. : p. 440-441 (34 ref.). - 24.10.15 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): 1,2,4-triazines--nucleophiles Аннотация: The electron structures of 3-substituted 1,2,4-triazines and isomeric N-methyltriazinium salts were calculated by the CNDO/2 method. The results of the calculations were compared with the parameters of the 13C, 15N, and 14N NMR spectra, as well as with experimental data on the protonation, N-alkylation, and reactions of 1,2,4-triazines with simple nucleophiles. The protonation centers of 1,2,4-triazines were determined by means of 1H, 13C, and 14N NMR spectroscopy. The covalent adducts formed by the proton salts of 3-methoxy-, 3-methylthio-, 3-morpholino-, and 3-pyrrolidino-1,2,4-triazine with water and methanol were recorded by 1H NMR spectroscopy. Доп.точки доступа: Alekseev, S. G.; Torgashev, P. A.; Fedotov, M. A.; Rezvukhin, A. I.; Shorshnev, S. V.; Belik, A. V.; Charushin, V. N.; Chupakhin, O. N.