TY JOUR TI KW молекулярная структура KW хелант KW металлохелат KW DFT KW 7-имино-1-окса-3,6,8,11-тетраазациклододекантетратион-4,5,9,10 KW molecular structure KW chelant KW metalchelate KW DFT KW 7-imino-1-oxa-3,6,8,11-tetraazacyclododecanetetrathione-4,5,9,10 JO Herald of Technological University AU , .. AU , .. PY 2025 IS 16 PB Kazan National Research Technological University