Abstract A synthesis of oligomeric substance of thiocol type, the poly (trimethyleneditelluride) , from 1-bromo-3-chloropropane and elemental tellurium is performed using a hydrazine hydrate-alkali system. Reductive splitting of the tellurocol followed by alkylation with methyl iodide give rise to preparation of bis (methyltelluro) propane, which was synthesized also from dimethyltelluride and 1, 3-dihalopropanes using the N 2 H 4· H 2 O/KOH system. ...