Convenient Synthesis of Tricycl 3.3.1.13,7 Tetrasilathianes and Tricycl3.3.1.13,7 Tetrasilaselenanes

摘要

There are only two reports describing the synthesis of adamantane-like structurescomposed of silicon and selenium (RSi) 4 Se 6, one which utilizes volatile H2Se with a trichlorosilane and the other requiring a reaction time several days between trichlorosilane and hexamethyldisilathiane. Of the few references for synthesizing the silicon-sulfur system, only one gives good yields deriving from RSiCl3 and (Me3Si) 2S. The instability of the Si-S or Si-Se bond toward hydrolysis imposes the requirement of an anhydrous route to these compounds. Recently we have reported convenient high-yield procedures for making anhydrous Na2S and Na2Se from sodium, sulfur, or selenium and a catalytic amount of naphthalene in THF as a useful step in preparing a variety of organic and organosilicon chalcogenides.