TY JOUR TI INTRAMOLECULAR TAUTOMERISM IN 3,6-DI-TERT-BUTYL-2-HYDROXYPHENOXYL KW prototropy KW semiquinone radical KW DFT KW solvent KW intramolecular bond JO Modern Technologies and Scientific and Technological Progress AU Murat, S.N. AU Nikolskiy, S.N. PY 2025 IS 2025 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»