Abstract
The syntheses of the title compounds are described, both starting from bis (3,4-dimethoxyphenyl)sulfide (7). The thiaselenin 4 is formed by melting 7 with selenium dioxide. Mercuration of 7 followed by reaction with tellurium tetrachloride leads via its dichloro derivative 10 to the thiatellurin 5. The 1H-NMR and MS data of compounds 4 and 5 are reported.