Phosphorus heptabromide
Phosphorus heptabromide is an inorganic compound with the 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
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| Other names
Tetrabromophosphonium tribromide Perbromophosphonium tribromide Phosphorus heptabromide | |
| Identifiers | |
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| Properties | |
| Br7P | |
| Molar mass | 590.302 g·mol−1 |
| Structure[1] | |
| orthorhombic | |
| Pnma, No. 64 | |
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 | |
The structure consists of a PBr4+ cation paired with a tribromide (Br3–) anion, and the tribromide is non-symmetric.[1]
References
- 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)
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