INTRAMOLECULAR SP2-SP3 DISEQUALIZATION OF CHEMICALLY IDENTICAL SULFONAMIDE NITROGEN ATOMS: SINGLE CRYSTAL X-RAY DIFFRACTION CHARACTERIZATION, HIRSHFELD SURFACE ANALYSIS AND DFT CALCULATIONS OF N-SUBSTITUTED HEXAHYDRO-1,3,5-TRIAZINES Статья Kletskov A.V., Gil D.M., Frontera A., Zaytsev V.P., Merkulova N.L., Beltsova K.R., Sinelshchikova A.A., Grigoriev M.S., Grudova M.V., Zubkov F.I. Crystals. MDPI AG. Том 10. 2020.