Phosphorus heptabromide

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Phosphorus heptabromide
Phosphorus heptabromide.svg
Phosphorus heptabromide ions spacefill.png
Names
IUPAC name
Tetrabromophosphanium tribromide
Other names
  • Perbromophosphonium tribromide
  • Phosphorus heptabromide
  • Tetrabromophosphonium tribromide
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
  • InChI=1S/Br4P.Br3/c1-5(2,3)4;1-3-2/q+1;-1
    Key: QBFSXBUUGDHSFY-UHFFFAOYSA-N
  • Br[P+](Br)(Br)Br.Br[Br-]Br
Properties
PBr7
Molar mass 590.302 g·mol−1
AppearanceRed prismatic crystals
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).

Phosphorus heptabromide is an inorganic compound with the chemical formula P Br 7. 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

  1. 1 2 Breneman, G. L.; Willett, R. D. (1967). "The crystal structure of phosphorus heptabromide, PBr7". Acta Crystallographica. 23 (3): 467–471. Bibcode:1967AcCry..23..467B. doi:10.1107/S0365110X67002981.
  2. ↑ T. E. (Thomas Edward) Thorpe. A dictionary of applied chemistry (Volume 4)
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