Tellurium Dicyanide

Silver cyanide acts on a benzene solution of the tetrabromide, replacing bromine by the cyanogen radical, with simultaneous reduction, the product being a solid tellurium dicyanide ... 

Tellurium Dicyanide, Te(CN)a.—Tellurium tetrabromide and silver cyanide in a suitable organic solvent such as benzene react according to the equation... 

Tellurium dicyanide after a low minutes exposure to air assumes a graphite-like appearance due to the deposition of tellurium. Water and alkalis hydrolyse it with precipitation of tellurium ... 

Tellurium dicyanide was prepared from tellurium tetrabromide and silver cyanide (Vol. IX, p. 932). Tellurium dicyanide, which was found to be quite stable in acetonitrile solution, reacted with excess cyanide ion to form tricyanotellurate(II) as an unstable intermediate3. 

From Dimethyl Tellurium Diiodide and Dimethyl Tellurium Dicyanide... 

Lowry and Gilbert1 claimed that dimethyl tellurium iodide cyanide is formed when dimethyl tellurium diiodide and dimethyl tellurium dicyanide are mixed in ethanol. The compound was not isolated and only a UV-visible absorption spectrum was reported. 

Diorgano tellurium dicyanides are obtained by treatment of diorgano tellurium dihalides with silver cyanide. Chloroform or acetone served as reaction media. 

Diaryl tellurium compounds can be obtained in moderate yields from potassium tellurocyanate and arenediazonium tetrafluoroborates in DMSO at room temperature. The potassium tellurocyanate is obtained from tellurium and potassium cyanide in DMSO. Aryl tellurium cyanides are probably formed as intermediates that disproportionate to the diaryl tellurium products and tellurium dicyanide. ... 

Dimethylaminophenyl 4-Ethoxyphenyl Tellurium Dicyanide 0.78 g (2 mmol) of 4-dimethylaminophenyl 4-ethoxyphenyl tellurium chloride iodide and 0.6 g (4 mmol) of silver cyanide in 30 ml of chloroform are stirred at 20°. The precipitated silver halides are filtered off and the filtrate is concentrated to give the product yield not given m.p. 192°. 

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