Chemical elements
  Silicon
    Isotopes
    Energy
    Physical Properties
    Chemical Properties
      Silicon Tetrahydride
      Silicomethane
      Silicane
      Silico-ethane
      Silico-acetylene
      Bromosilicane
      Silicofluoroform
      Trifluorosilicane
      Silicochloroform
      Trichlorosilicane
      Silicobromoform
      Tribromosilicane
      Silico-iodoform
      Tri-iodosilicane
      Silicon Tetrafluoride
      Hydrofluosilicic Acid
      Silicon Subfluoride
      Silicon Tetrachloride
      Tetrachlorosilicane
      Silicon Tetrabromide
      Tetrabromosilicane
      Silicon Tetra-iodide
      Tetra-iodosilicane
      Mixed Halides of Silicon
      Halogen Derivatives of Silico-ethane
      Halogen Derivatives of Silicopropane
      Halogen Derivatives of Silicobutane
      Halogen Derivatives of Silicopentane and Silicohexane
      Silicon Oxychlorides
      Silica
      Silicon Dioxide
      Silicates
      Silicoformic Anhydride
      Silico-oxalic Acid
      Silicomes-oxalic Acid
      Silicon Disulphide
      Silicon Monosulphide
      Silicon Oxysulphide
      Silicon Thiochloride
      Silicon Thiobromide
      Silicon Chloroitydrosulphide
      Silicothio-urea
      Silicon Selenide
      Silicon Tetramide
      Silicon Di-imide
      Silicon Nitrimide
      Silicam
      Siliconitrogen Hydride
      Silicon Nitrides
      Crystalline Silicon Monocarbide
      Carborundum
      Silicon Dicarbide
      Silicon Carboxide
      Borides of Silicon
    PDB 1fuq-4ehr

Silicon Disulphide, SiS2






Silicon Disulphide, SiS2, can be prepared by passing the vapour of carbon disulphide over a heated mixture of silica and carbon, but is best obtained by heating to a red heat an intimate mixture of amorphous silicon with three times its weight of powdered sulphur, and subliming the product under reduced pressure. It is also formed by the dry distillation of the thiochloride:

2SiSCl2 = SiS2 + SiCl4,

and by adding lithium silicide to molten sulphur.

Silicon disulphide forms white silky needles, which may be sublimed in an inert atmosphere, but which burn to silica and sulphur dioxide when heated in air. Moisture decomposes this compound, forming silica and hydrogen sulphide; chlorine forms chlorides of sulphur and silicon; fused sodium sulphide yields sodium thiosilicate, Na2SiS3, so that silicon disulphide, SiS2, is thiosilicic anhydride.


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