Studies on Organic Fluorine Compounds. XIII. Studies on Equilibrium of (Trifluoro- and/or Chlorodifluoromethyl)-dihydro-s-triazine Derivatives by ¹⁹F-Nuclear Magnetic Resonance Spectra

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Behavior of the chemical shifts in ¹⁹F-nuclear magnetic resonance spectra of [polyfluoro-(chloro) methyl]-dihydro-s-triazine derivatives in deuterochloroform and in methanol was examined and it was concluded that these compounds exist in the form of 1, 4-dihydro type (A) and 1, 2-dihydro type (B and B') and that they are in equilibrium in methanol solution.