A series of cyclopentadienyllanthanum complexes with the disilylated metalloid germanium cluster [Ge(9)(Hyp)(2)]^(2-) [Hyp = Si(SiMe(3))(3)] has been prepared and fully characterized. The synthetic procedure is based on the salt metathesis reaction of two different cyclopentadienyllanthanum diiodides CpLaI(2) (Cp: Cp*, pentamethylcyclopentadienyl; Cp^(ttt), 1,2,4-tri-tert-butylcyclopentadienyl) with K(2)[Ge(9)(Hyp)(2)] in tetrahydrofuran (THF) with a subsequent extraction with n-hexane. …