Organotin–Oxido Cluster-Based Multiferrocenyl Complexes Obtained by Hydrolysis of Ferrocenyl-Functionalized Organotin Chlorides

Three organotin–oxido clusters were formed by hydrolysis of ferrocenyl-functionalized organotin chloride precursors in the presence of NaEPh (E=S, Se). [RFcSnCl3⋅HCl] (C; RFc = CMe2CH2C(Me)NNC(Me)Fc) and [SnCl6]2− formed {(RFcSnCl2)3[Sn(OH)6]}[SnCl3] (3 a) and {(RFcSnCl2)3[Sn(OH)6]}[PhSeO3] (3 b), bearing an unprecedented [Sn4O6] unit, in a one-pot synthesis or stepwise through [(RFcSnCl2)2Se] (1) plus [(RFcSnCl2)SePh] (2). A one-pot reaction starting out from FcSnCl3 gave [(FcSn)9(OH)6O8Cl5] (4), which represents the largest Fc-decorated Sn/O cluster reported to date.