The Tridurylsilylium and Tridurylstannylium Cations: Free and Not So Free
摘要:
Allyltridurylsilane has been prepared and converted to the tridurylsilylium cation by treatment with electrophiles. Allyltridurylstannane has been prepared and converted to the tridurylstannylium cation under similar conditions. The Si-29 chemical shift of the silylium cation indicates that it is free and tricoordinate, whereas the Sn-119 chemical shift of the stannylium cation indicates that it maintains loose fourth coordination with the solvent or the anion.