Thiocarbonyl Chloride, Carbon Dichlorosulphide, or Thiophosgene, CSCl2, is produced by the prolonged action of dry chlorine on carbon disulphide:
CS2 + 2Cl2 = SCl2 + CSCl2,
or by passing mixed carbon tetrachloride and hydrogen sulphide vapours through a red-hot tube:
CCl4 + H2S = CSCl2 + 2HCl.
It may also be obtained by reduction of carbon tetrachlorosulphide, CSCl4, with tin and hydrochloric acid.
The chloride is a red, mobile liquid, with a suffocating odour. It has a density of 1.5085 at 15° C., and boils at 73.5° C. It fumes in moist air and is decomposed by water or alkalis, forming carbonic and hydrochloric acids or their salts and hydrogen sulphide. |