Bis-thiosulfonates

The yellow tellurium bis[thiosulfonates] are stable as pure solids at 20°, but decompose to elemental tellurium when heated to their melting points2. With alkalis, tellurium is deposited3. 

Structural investigations showed that the tellurium in tellurium bis[thiosulfonates] is bonded to two sulfur atoms with an S —Te —S angle of approximately 100°4-6. In the bis[thiourea] adducts of these compounds, tellurium is in the center of a /raw.v-square planar arrangement of sulfur atoms7 u. 

Bis[thiourea]tdlurium bis[thiosulfonates were obtained when thiourea-tellurium dihalide complexes were reacted with potassium thiosulfonates or when tellurium bis[thiosulfon-atcs] were treated with thioureas. Methanol or dimethylformamide served as the reaction medium. 

Tetrakis[thiourea]tellurium dichlorides and sodium thiosulfonates reacted in methanol or dimethylformamide to give bis[thiourea tellurium bis[thiosulfonates]. 

Bis[tetramethylenethiourea]tellurium bis[thiosulfonates] were isolated when the tellurium bis[thiosulfonates] and the ligand were heated in methanol2. 

Tellurium bis[thiosulfonates] were converted to bis[thiosulfato]tellurates(II) when chloroform solutions of the tellurium thiosulfonates were shaken with an aqueous solution of sodium thiosulfate1,2. 

Tellurium bis[thiosulfonates] formed tellurium bis[dimethyldithiocarbamates] when treated with sodium dimethyldithiocarbamate in an organic solvent1-3. 

---