Octachlorotetraphosphazene is an inorganic compound with the formula (NPCl<sub>2</sub>)<sub>4</sub>. The molecule has a cyclic, unsaturated backbone consisting of alternating phosphorus and nitrogen centers, and can be viewed as a tetramer of the hypothetical compound Nâ¡PCl<sub>2</sub>.
The compound has not been studied as much as the related species hexachlorotriphosphazene, in the samples of which octachlorotetraphosphazene is usually found as an unwanted contamintant.
Octachlorotetraphosphazene has a P<sub>4</sub>N<sub>4</sub> core with six equivalent PâÂÂN bonds.
Some spiro-, ansa-, and spiro-ansa-cyclic derivatives have been prepared via nucleophilic substitution of octachlorotetraphosphazene with alkoxides.