Phosphorus heptabromide
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IUPAC name Tetrabromophosphanium tribromide | |
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Properties | |
Chemical formula | PBr7 |
Molar mass | 590.302 g·mol−1 |
Appearance | Red prismatic crystals |
Structure[1] | |
Crystal structure | Orthorhombic |
Space group | Pnma, No. 64 |
Lattice constant | a = 9.35 Å, b = 7.94 Å, c = 14.69 Å |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references |
Chemical compound
Phosphorus heptabromide is an inorganic compound with the chemical formula PBr7. It is one of the phosphorus bromides. At normal conditions, it forms red prismatic crystals. PBr7 can be prepared by the sublimation of a mixture of phosphorus pentabromide and bromine.[2]
- PBr5 + Br2 → PBr7
The structure of PBr7 consists of a tetrabromophosphonium cation [PBr4]+, paired with a tribromide anion [Br3]−, and the tribromide anion is non-symmetric.[1]
See also
References
- ^ a b Breneman, G. L.; Willett, R. D. (1967). "The crystal structure of phosphorus heptabromide, PBr7". Acta Crystallographica. 23 (3): 467–471. doi:10.1107/S0365110X67002981.
- ^ T. E. (Thomas Edward) Thorpe. A dictionary of applied chemistry (Volume 4)