Chemical elements
  Tin
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Tetramethyl Stannane
      Methyl stannic chloride
      Tin Tetra-ethyl
      Tin Tri-ethyl
      Stannous Fluoride
      Stannic Fluoride
      Sodium Stannifluoride
      Potassium Stannifluoride
      Ammonium Stannifluoride
      Stannous Chloride
      Stannic Chloride
      Chlorostannates
      Stannous Bromide
      Stannic Bromide
      Stannous Iodide
      Stannic Iodide
      Mixed Stannic Halides
      Stannous Oxide
      Stannous Hydroxide
      Stannic Oxide
      Potassium Stannate
      Stannic Acid and its Derivatives
      Parastannic Acid
      Stannyl Chloride
      Parastannyl Chloride
      Stannous Sulphide
      Stannic Sulphide
      Stannic Oxysulphide
      Stannic Iodosulphide
      Stannous Sulphate
      Stannic Sulphate
      Stannic Nitrate
      Stannous Nitrate
      Phosphor-tin
      Stannioxalic Acid
      Stannous Tartrate
      Tin and Silicon
      Stannous Tungstate
    PDB 3e94-3kwy

Stannous Bromide, SnBr2






Stannous Bromide, SnBr2, is prepared by allowing molten tin to cool to 200° C., powdering the metal in a mortar, and dissolving the powder in concentrated hydrobromic acid solution. It may also be obtained by heating tin in hydrogen bromide gas, or distilling the metal with mercuric bromide. It is a pale yellow, crystalline mass, of density 5.1, which melts at 215.5° C., and boils at 619° C. The heat of formation of the solid from tin and liquid bromine is 61,500 calories. Stannous bromide forms a hydrate with water, which is probably SnBr2.H2O; it is, however, hydrolysed by much water, with separation of a white oxybromide. With ammonium bromide, stannous bromide forms the complex salt (NH4)2SnBr4.H2O or (NH4)2SnBr4.2H2O, and also, NH4SnBr3.H2O; whilst with ammonium chloride (NH4)2SnBr2Cl2.H2O and with potassium bromide K2SnBr4.2H2O and KSnBr3.H2O result.


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