Diselenium Tellurium Compounds

Selenocyanate groups can be linked to tellurium via the nitrogen or selenium atoms. In view of this uncertainty, cyanates, thiocyanates, and selenocyanates are discussed under diorgano dinitrogen compounds (page 639). 

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Quite a large number of organic tellurium compounds with a C —Te —S or a C-Te —Se unit have been prepared. Most of the compounds are rather stable towards atmospheric agents. The low molecular mass compounds have a tendency to convert to diorgano ditellurium and diselenium derivatives. 

The [3]- and [4]-dendralene analogs, the sulfur atoms of which are replaced by selenium or tellurium atoms, have been reported by Cava and coworkers (Figure 8.3) [21, 22]. The CV of compounds 6c,d and 7c,d indicate similar redox processes to 3c and 3d. The oxidation potentials of 6c and 6d, however, are higher than those of 3c and 3d, owing to the replacement of a DT unit by a 1,3-diselenium ring reflecting the higher polarizability of Se atoms. A similar trend was observed... 

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