Hexachlorophosphazene

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What Wikipedia says

Hexachlorophosphazene is an inorganic compound with the chemical formula (NPCl2)3. The molecule has a cyclic, unsaturated backbone consisting of alternating phosphorus and nitrogen atoms, and can be viewed as a trimer of the hypothetical compound N≡PCl2 (phosphazyl dichloride).

Excerpt from the Wikipedia article “Hexachlorophosphazene”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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