Chemical elements
  Antimony
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
    Compounds
      Antimony Trihydride
      Antimony Trifluoride
      Antimony Pentafluoride
      Antimony Trichloride
      Oxychlorides of Tervalent Antimony
      Antimony Tetrachloride
      Antimony Pentachloride
      Chloroantimonic Acids
      Antimonyl Perchlorate
      Antimony Tribromide
      Antimony Oxybromides
      Antimony Pentabromide
      Antimony Triiodide
      Antimony Oxyiodide or Antimonyl Iodide
      Antimony Thioiodide
      Mixed Antimony Halides
      Antimony Trioxide
      Hydrated Antimony Trioxide
      Antimonites
      Antimony Tetroxide or Antimony Dioxide
      Antimony Pentoxide
      Antimony Trisulphide
      Antimony Pentasulphide
      Thioantimonates
      Normal Antimony Sulphate
      Potassium Stibiothiosulphate
      Antimony Selenate
      Antimony tritelluride
      Antimony Phosphide
      Antimonyl Dihydrogen Phosphite
      Antimony Phosphate
      Antimony Pyrophosphate
      Antimony Thiophosphate
    PDB 1exi-2xqa

Antimony Pentabromide, SbBr5






Antimony Pentabromide, SbBr5, has not yet been isolated; its existence, however, is indicated by the action of antimony trihydride upon an aqueous solution of a mixture of bromine and potassium bromide, while molecular weight determinations on solutions in bromine by the boiling point method also suggest the existence of this compound. Complex compounds with organic bases have been prepared, in addition to many complex inorganic salts; these may perhaps be regarded as salts of bromoantimonic acids.

Of the three possible acids only one has been obtained in the free state. By crystallisation from a solution containing antimony tri-bromide, bromine and either hydrobromic or sulphuric acid the compound meta-bromoantimonic acid, HSbBr6.3H2O, has been prepared in the form of hygroscopic, irregular, six-sided, black tablets. It decomposes readily, with evolution of bromine, leaving a residue of antimony tribromide. The following salts, corresponding to this acid, have also been prepared:

LiSbBr6.4H2OBlack, square, hygroscopic tablets.
KSbBr6.H2OStout, six-sided, black tablets.
NH4SbBr6.H2OResembles the potassium salt.
Fe(SbBr6)3.14H2OBlack, irregular, six-sided tablets; very hygroscopic.
Ni(SbBr6)2.12H2OBlack, glistening, irregular, six-sided tablets.


Other complex salts that have been described include:

2SbBr5.3CsBr.2H2OBlack, microcrystalline powder.
3SbBr5.2BeBr2.18H2OBlack, glistening prisms.
5SbBr5.2AlBr3.24H2OBlack, glistening, stout prisms.


Some of the organic compounds suggest relationship with pyrobromoantimonic acid.
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