The Parent Cyclopentadienyltin Cation, Its Toluene Adduct, and the Quadruple‐Decker [Sn₃Cp₄]²⁺

Abstract

Abstract 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(CF 3 ) 3 } 4 ] − and [{(F 3 C) 3 CO} 3 Al−F−Al{OC(CF 3 ) 3 } 3 ] − anions. [SnCp][Al{OC(CF 3 ) 3 } 4 ] was used to prepare the first main‐group quadruple‐decker cation [Sn 3 Cp 4 ] 2+ again as the [Al{OC(CF 3 ) 3 } 4 ] − salt. Additionally, the toluene adduct [CpSn(C 7 H 8 )][Al{OC(CF 3 ) 3 } 4 ] was obtained.