Chemical elements
  Germanium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Germanium Hydride
      Germanium Tetra-ethyl
      Germanium Chloroform
      Germanous Fluoride
      Germanic Fluoride
      Hydrofluogermanic Acid
      Potassium Germanifluoride
      Fluogermanate
      Germanous Chloride
      Germanic Chloride
      Germanium Oxychloride
      Germanic Bromide
      Germanic Iodide
      Germanous Oxide
      Germanous Hydroxide
      Germanic Oxide
      Germanous Sulphide
      Germanic Sulphide
      Germanium Ultramarine

Germanium Chloroform, GeHCl3






Germanium Chloroform, GeHCl3, like the hydride GeH4, connects germanium with the non-metals carbon and silicon. Indeed GeHCl3 closely resembles SiHCl3 in chemical properties.

Germanium chloroform is formed as a vapour, condensible in ice to a volatile liquid, when hydrogen chloride gas is passed over slightly heated powdered germanium. There is formed at the same time, owing to the presence of a trace of water, a certain quantity of the oxychloride GeOCl2, which it is difficult to remove from the chloroform. Germanium chloroform is a colourless liquid boiling at 72° C., which becomes turbid on exposure to air owing to the formation of the oxychloride, and is decomposed by water, with separation of germanous hydroxide, thus:

GeHCl3 + 2H20 = Ge(OH)2 + 3HCl.

This manner of decomposition does not at first appear to be analogous to that of silicon chloroform, which reacts thus with water:

2SiHCl3 + 4H2O + 6HCl + H2O

but if Ge(OH)2 is regarded as an analogue of formic acid, having the constitution HGeOOH, the analogy becomes apparent.

The vapour density of GeHCl3 has been found to be 79.9 (H = 1); since the theoretical value is 89.4 there appears to be some dissociation.


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