Hexafluorophosphazene is an inorganic compound with the formula . It takes the form of a white powder or lumps. It is sensitive to moisture and heat.
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 (phosphazyl difluoride). Its classification as a phosphazene highlights its relationship to benzene. Hexafluorophosphazene has a hexagonal ring with six equivalent PâÂÂN bonds. Each phosphorus atom is additionally bonded to two fluorine atoms.
The molecule possesses D<sub>3h</sub> symmetry, and each phosphorus center is tetrahedral.
The ring in hexachlorophosphazene deviates from planarity and is slightly ruffled (see chair conformation). By contrast, the ring in hexafluorophosphazene is completely planar.