Über Phosphorstickstoff-Verbindungen XXVIII. Über Reaktionen von Cyanamid,Dicyanimid und Dicyandiamid mit PCl5

Interaction between cyanamide and PCl₅ in the mole ratio 1:3 yields the phosphazenium salt Cl₃P?N? C(Cl)?N? PCl₃] PCl₆]. The reaction of sodium dicyanimide and PCl₅ gives 1. 1. 3. 5-tetrachloro-1-phospha-2. 4. 6-triazine (compound B in ?Inhaltsübersicht”?). Dicyandiamide and PCl₅ (1:2) give compound C and, at milder conditions the salt-like phosphatriazine D. Solvolysis of C with formic acid or of D with sulphur dioxide yields E.