SYNTHESIS AND REACTIONS OF STANNANESELONE

Stannaneselone Tbt(Tip)Sn=Se (Tbt = 2,4,6-tris[bis(trimethylsilyl)meth yl]phe Tip = 2,4,6-triisopropylphenyl), a novel compound containing a tin-selenium double bond was synthesized by the reaction of the corres ponding stannylene Tbt(Tip)Sn with elemental selenium. It reacted with phenyl isothiocyanate, mesitonitrile oxide and styrene oxide to affor d cycloadducts. In the reaction with phenyl isothiocyanate, 1,3,2-dith ia- and diselenastannetanes were obtained instead of the expected 1,3, 2-thiaselenastannetane. Another approach to the stannaneselone by dese lenation of the corresponding 1,2,3,4,5-tetraselenastannolane with tri phenylphosphine is also described.