SYNTHESIS AND REACTIONS OF PENTAMETHYLCYCLOPENTADIENYLTIN COMPOUNDS

Pentamethylcyclopentadienylhalostannanes are accessible by alkylation of tin tetrachloride and organotrichlorostannes with organolithium compounds and by oxidative addition reactions with decamethylstannocene, whose synthesis is also described. Bis(pentamethylcyclopentadienyl)dihalostannanes are attacked by halogen containing electrophiles at the pentamethylcyclopentadiene ring and transferred into pentamethylcyclopentadienyltrihalostannanes. After nucleophilic attack by pyridine a reductive elimination reaction under CC bond formation is observed between two pentamethylcyclopentadienyl fragments. The mass spectra of the new compounds are discussed. © 1979.