Vier-und fünfgliedrige Phosphorheterocyclen, L [1] Tautomeric und Substitution am 5 -Dimethylamino -1.2.4.3λ3-triazaphosphol [2] / Four- and Fivemembered Phosphorus Heterocycles, L [1] Tautomerism and Substitution at 5-Dimethylamino-l,2,4,3λ3 -triazaphosphole [2

Abstract

Abstract 1,2,4,3 λ3 -Triazaphospholes unsubstituted at the heteroatoms can be synthesized only if they carry an amino group in 5-position. The title compound, being the first representative, was prepared from N,N-dimethyl-N′-aminoguanidinium iodide and P(NMe2)3. Its single proton is not bonded to phosphorus but to nitrogen and causes association by NH···N bridges. The proton was substituted for silyl, stannyl, phosphino and thiophosphinyl groups assumedly in 2-position. The phosphino derivatives react with sulfur only at the exocyclic phosphorus. Loss of N2 from the triazaphosphole ring was observed in one case.