Phosphorus heptabromide
Phosphorus heptabromide is an inorganic compound with the chemical formula. It is one of the phosphorus bromides. At normal conditions, it forms red prismatic crystals. can be prepared by the sublimation of a mixture of phosphorus pentabromide and bromine.
The structure of consists of a tetrabromophosphonium cation, paired with a tribromide anion, and the tribromide anion is non-symmetric.