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

\xCE\xB2-Stannyl Chloride, Sn5O9Cl2






Chloride, Sn5O9Cl2.4H2O, is related to β-stannic acid, which may be written Sn5O9(OH)2.4H2O; and it may, therefore, be regarded as the chloride of this acid. An alternative view is to consider the hydroxide as amphoteric, and as behaving as a diacid base, of which β-stannyl chloride is a salt. Because of the mode of formation and properties of the chloride this latter view is perhaps to be preferred; thus it is a basic stannic chloride.

β-stannyl chloride is prepared by first acting on tin with nitric acid of density 1.3 to 1.4, the temperature being kept low to prevent the formation of parastannic acid; hydrochloric acid is then added to the resulting β-stannic acid, and the gelatinous mass produced is diluted with water and filtered. The filtrate is precipitated with hydrochloric acid, the precipitate washed with the acid diluted with an equal volume of water, and the product dried in a vacuum over sulphuric acid and potash. The β-stannyl chloride thus obtained is a transparent, glassy mass which contains nine or four molecules of water to one molecule of Sn5O9Cl2, according to whether it has been dried in air or in a vacuum. It is soluble in dilute hydrochloric acid, and unlike stannic chloride is reprecipitated by the strong acid. This compound is also formed by hydrolysis when dilute solutions of stannic chloride are kept.


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