Chemical elements
    Physical Properties
    Chemical Properties
      Carbon Tetrafluoride
      Carbon Tetrachloride
      Carbon Tetrabromide
      Carbon Tetraiodide
      Carbon Oxychloride
      Carbonyl Chloride
      Carbon Oxybromide
      Carbonyl Bromide
      Carbon Suboxide
      Carbon Monoxide
      Carbon Dioxide
      Percarbonic Acid
      Carbamic Acid
      Carbon Disulphide
      Carbonyl Sulphide
      Carbon Oxysulphide
      Thiocarbonyl Chloride
      Thiocarbonic Acid
      Thiocarbamic acid
      Carbon Monosulphide
      Carbon Subsulphide
      Carbon Sulphidoselenide
      Carbon Sulphidotelluride
      Carbon Nitrides
      Hydrocyanic Acid
      Prussic Acid
      Cyanogen Chloride
      Cyanogen Bromide
      Cyanogen Iodide
      Polymerised Cyanogen Halides
      Cyanic Acid
      Cyanuric Acid
      Fulminic Acid
      Thiocyanic Acid
      Sulphocyanic Acid
      Isoperthiocyanic Acid
      Cyanogen Sulphide
      Thiocyanic Anhydride
    Amorphous Carbon

Carbon Oxybromide, COBr2

Carbon oxy-bromide COBr2, is obtained in an impure condition by the interaction of phosphorus or boron tribromide and carbon oxychloride, and also in small quantities by the union of carbon monoxide and bromine in presence of aluminium bromide, or under the influence of the silent electric discharge. The rate of combination of the dry gases is very slow; probably no reaction would take place between them in the complete absence of water. Carbon oxybromide is best obtained5 by slowly dropping concentrated sulphuric acid into carbon tetrabromide heated to about 160° C., and redistilling the product after contact with metallic antimony:

CBr4 + H2SO4 = COBr2 + 2HBr + SO3.

Carbon oxybromide is a colourless, mobile, fuming liquid of density 2.45 at 15° C. It boils at 64°-65° C. with slight decomposition; it is more stable towards water than carbonyl chloride; like the latter, it reacts with dimethyl aniline to form dye-stuffs.

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