Phosphoraustausch im Cyclophosphazenring bei der Reaktion Hydridocyclotri(phosphazen)/Perthiophosphonsäureanhydrid [1] / Exchange of Phosphorus in the Cyclophosphazene Ring in the Reaction Hydridocyclotri (phosphazene )/Perthiophosphonic Anhydride [1]

Abstract

Abstract The 2-hydrido-2-methyl-cyclotri(phosphazene) (1) reacts with perthiophosphonic anhydrides (2) to give cyclotri(phosphazene)diene-2-thiones (3). When 2 contains R ≠ CH3, mixtures of CH3-3 and R-3 are obtained. This must be due to a competition of sulfur transfer from 2 to 1 and the insertion of a RPS unit from 2 into 1 involving the opening and reclosure of the N3P3 ring. The unusual lability of the cyclotri (phosphazene) ring probably arises from the prototropy in 1