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 Subsulphide, C3S2

By passing the vapour of carbon disulphide over an electric arc with carbon poles, Lengyel obtained a deep red, tear-exciting liquid which appeared to be C3S2. When heated under reduced pressure this liquid partly distilled, and was partly converted into a black, solid polymer. With bromine it formed C3S2Br6, a yellow solid with an aromatic smell.

Carbon subsulphide has more recently been obtained by Stock and Praetorius, who found that the best way to prepare it was to strike an arc between a carbon cathode and an anode consisting of antimony containing 7 per cent, of carbon placed beneath the surface of liquid carbon disulphide. The subsulphide dissolves in the disulphide as it is formed, producing a red solution, and when separated and distilled in a vacuum and condensed in a receiver at -40° C. forms a yellowish-red solid whose melting-point is -0.5° C. At ordinary temperature it is a bright red, strongly refractive liquid; it has a vapour density and a molecular weight in carbon disulphide solution corresponding to the formula C3S2, and polymerises at 90° C. With aniline it forms thiomalonanilide; it therefore bears the same relation to thiomalonic acid that carbon suboxide bears to malonic acid; consequently the constitutional formula S:C:C:C:S is attributed to this compound.

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