Аннотация:The reaction of perfluoro-N-methylmorpholine with SbF5 leads to perfluoromorpholinimine [2,2,3,3,5,6,6-heptafluoro-3,6-dihydro-2H-1,4-Oxazine (I)] in good yield. Perfluoromorpholinimine (I) also reacts with alkali metal fluorides (CsF) in aprotic solvents to give the corresponding stable perfluorinated aza- anion (II) (according to 19F NMR data). We have studied the reactivity of aza-anion (II) in its reactions with various agents.