ЕЛЕКТРОННІ СПЕКТРИ ВБИРАННЯ ТА ДОСЛІДЖЕННЯ ТІОН-ТІОЛЬНОЇ ТАУТОМЕРІЇ ПОХІДНИХ 4-R-3-(ТІОФЕН-2-ІЛ)-1Н-1,2,4-ТРІАЗОЛ-5(4Н)-ТІОНУ
The UV spectra of 4-R-3-(thiophene-2-yl)-1H-1,2,4-triazole-5(4H)-thione derivatives in solvents with different polarity were studied. The types of transitions of electrons, which cause the absorption bands observed absorption spectra were identified. Thione-thiol equilibrium of the investigated compounds were studied.