Dibenzo-l,4-oxatellurine

A number of sulfate-containing derivatives of dibenzo-l,4-oxatellurin were isolated3-5 as products of the reactions between sulfuric acid and the heterocyclic compound or its 10,10-diacetate3. 

A few diorgano tellurium hydroxide (hydrogen) sulfates are reported in the older literature. Diethyl tellurium hydroxide sulfates were claimed to have been produced from the hydroxide chloride and silver sulfate1 and from the dihydroxide and sulfuric acid2. Several ill-defined compounds that could be or could contain hydroxide hydrogen sulfates were obtained when dibenzo-l,4-oxatellurin or its 10,10-diacetate were treated with sulfuric acid3. 

Dibenzo-l,4-oxatellurine 8-Fluoro-2,10,10-trichloro- E12b, 848 (Ar20 + TeCl4)... 

Dibenzo-l,4-oxatellurin 2-Carboxy-10,10-dichlor- E12b, 848 (2-OAr — Ar — TeCl3 A)... 

Dibenzo-l,4-oxatellurin 10,10-Dibrom-2-fluor-8-methyl- E12b, 556 (Bromierung)... 

Alkali metal hydrogen sulfites reduced dibenzo-l,4-oxatellurin 10,10-diacetate to dibenzo-1,4-oxatellurin and diphenyl tellurium diacetate to diphenyl tellurium. Other reducing... 

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