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

Germanium Tetra-ethyl, Ge(C2H5)4

The existence of Germanium Tetra-ethyl, Ge(C2H5)4, the properties of which were foretold by Mendeleeff, shows that germanium shares with other metals of the B subgroups the ability to form volatile organo-metallic compounds. It is formed by the interaction of germanic chloride and zinc ethyl in an atmosphere of carbon dioxide:

GeCl4 + 2Zn(C2H5)2 = Ge(C2H5)4 + 2ZnCl2,

is separated from the zinc chloride by water, extracted with ether, dried and distilled.

Germanium ethyl is a colourless liquid having a feeble odour like that of leeks; it is immiscible with, and lighter than, water, and boils at 160° C. Its vapour density at 230° C. is 119 (H = 1), which corresponds to a molecular weight of 238. Since the molecular weight corresponding to the formula Ge(C2H5)4 is 188, the molecules are probably associated in the state of vapour. The vapour burns with a yellowish red flame and forms an explosive mixture with oxygen.

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