TY JOUR TI KW механизм протонирования KW метод DFT KW 2-метилбутен-2 KW правило Марковникова KW mechanism protonizataion KW method DFT KW 2-methylbutene-2 KW Markovnikov's rule JO Herald of Technological University AU , .. AU , .. AU , .. AU , .. PY 2025 IS 17 PB Kazan National Research Technological University