NMR SPECTRA OF PHOSPHORYLATED CARBAMIDE-CONTAINING HETEROCYCLES: PECULIARITIES OF CHEMICAL SHIFTS FROM THE VALENCE STATE OF THE PHOSPHORUS AND THE SIZE OF THE CYCLE
Ключевые слова:
heterocyclic compounds, NMR spectroscopy, phosphazo compounds, phosphorylated carbamide containing heterocycles (PCCH), 3-coordinated phosphorus atom, 5-coordinated phosphorus atom.Аннотация
The article discusses the results of using NMR spectroscopy to study the structure and flexibility of
the skeleton of the analyzed molecules of phosphaze compounds and the electronic environment of nitrogen and
phosphorus atoms. The authors carried out a cumulative system analysis of chemical shifts in the 31P and 13C NMR
spectra of 89 phosphorus derivatives of carbamidecontaining heterocycles, which differ in the valence state of the
phosphorus atom, the size of the cycle and the method of cycle junction.