| Summary: | The reaction of tellurium tetrachloride with acetylene proceeds in a stereospecific <em>anti</em>-addition manner to afford the novel products <em>E</em>-2-chlorovinyltellurium trichloride and <em>E</em>,<em>E</em>-bis(2-chlorovinyl)tellurium dichloride. Reaction conditions for the selective preparation of each of these products were found. The latter was obtained in 90% yield in CHCl<sub>3</sub> under a pressure of acetylene of 10–15 atm, whereas the former product was formed in up to 72% yield in CCl<sub>4</sub> under a pressure of acetylene of 1–3 atm. Synthesis of the previously unknown<em> E,E</em>-bis(2-chlorovinyl) telluride, <em>E</em>,<em>E</em>-bis(2-chlorovinyl) ditelluride, <em>E</em>-2-chlorovinyl 1,2,2-trichloroethyl telluride and <em>E</em>,<em>E</em>-bis(2-chlorovinyl)-tellurium dibromide is described.
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