The Parent Cyclopentadienyltin Cation, Its Toluene Adduct, and the Quadruple-Decker Sn3Cp4(2+)

摘要

Truly cationic metallocenes with the parent cyclopentadienyl ligand are so far unknown for the Group 14 elements. Herein we report on an almost "naked" SnCp(+) cation with the weakly coordinating Al{OC(CF3)(3)}(4)(-) and {(F3C)(3)CO}(3)Al-F-Al{OC(CF3)(3)}(3)(-) anions. SnCpAl{OC-(CF3)(3)}(4) was used to prepare the first main-group quadruple-decker cation Sn3Cp4(2+) again as the Al{OC(CF3)(3)}(4)(-) salt. Additionally, the toluene adduct CpSn(C7H8)Al{OC-(CF3)(3)}(4) was obtained.