σH-Adducts of 1-alkyl-1,4-diazinium salts as the sources of biradicals in the synthesis of tetraazaphenanthrenes / E. V. Verbitskiy, P. A. Slepukhin, M. A. Ezhikova, M. I. Kodess, Yu. N. Shvachko, D. V. Starichenko, G. L. Rusinov, V. N. Charushin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №5. - С. 975-980 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): PH-ADDUCTS -- BIRADICALS -- TETRAAZAPHENANTHRENES Аннотация: O- and C-Adducts of 5-(het)aryl-2,3-dicyano-1-ethylpyrazinium salts are latent sources of biradicals capable of forming tetraazaphenanthrene derivatives via dimerization. The mechanisms of the reactions were examined using ESR spectroscopy. The stereochemistry of the resulting heterocyclic systems was studied by NMR spectroscopy. The crystallographic data on their three-dimensional structures were obtained \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2011, 60 (5), 975-980.pdf |