S 89 Structure of 5,6,7,8-tetrafluoro-4-hydroxycoumarins [Электронный ресурс] / K. V. Scherbakov, Ya. V. Burgart, M. I. Kodess, V. I. Saloutin // Chemistry of Heterocyclic Compounds. - 2012. - Vol.48, №9. - P1297-1306 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 5,6,7,8-TETRAFLUORO-4-HYDROXYCOUMARIN -- IMINE-ENAMINE TAUTOMERISM -- KETO-ENOL TAUTOMERISM Аннотация: The structure of 5,6,7,8-tetrafluoro-4-hydroxycoumarin and its 3-substituted derivatives was studied by X-ray structural analysis and IR, 1H, 13C, and 15N NMR spectroscopy. It was established that the nature of the substituent at the position 3 of the coumarin ring has a significant effect on its stru \\\\Expert2\\NBO\\Chemistry of Heterocyclic Compounds\\2012, v.48, N 9, p.1297-1306.pdf |