TY JOUR TI RELATIVISTIC CALCULATIONS OF MAGNETORESONSONIC PARAMETERS IN STRUCTURAL STUDIES OF ELEMENTENTORGANIC COMPOUNDS KW quantum chemical calculations of high level KW relativistic effects KW magnetic shielding constants KW spin-spin interaction constants KW nitrogen- KW silicon- KW phosphorus- KW selenium- and organo-organo-compounds. JO Modern Technologies and Scientific and Technological Progress AU Krivdin, L.B. PY 2020 IS 2018 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»