The reaction of [Cp₂ZrCl₂] with the lithium salt Li[FcBH₃] in stoichiometric ratios of 1.5 : 1 or 0.4 : 1 furnishes the mixed-metallocene complexes [Cp₂(Cl)Zr(H₃BFc)] (1) and [Cp₂Zr(H₃BFc)₂] (3), respectively (Cp = cyclopentadienyl; Fc = ferrocenyl). When the two reagents are combined in a ratio of 0.6 : 1, complex 1 is formed together with the zirconium hydride species [Cp₂(H)Zr(H₃BFc)] (2). Compound 2 can be obtained in pure form from [Cp₂Zr(H)Cl] and Li[FcBH₃]. Treatment of the half-sandwich complexes [(C₅R₅)ZrCl₃] with 3 equivalents of Li[FcBH₃] leads to the heterotetranuclear aggregates [(C₅R₅)Zr(H₃BFc)₃] (4: R = H; 5: R = CH₃). Li₂[fc(BH₃)₂] and 3 equivalents of [Cp₂ZrCl₂] give the heterotrinuclear compound [fc(BH₃Zr(Cl)Cp₂)₂] (6) with bridging ferrocenylene core (fc = 1,1′-ferrocenylene). According to X-ray crystallography, the trihydroborate ions are coordinated in a [Zr(μ-H)₂B(H)–] fashion in 1, 2, 3 and 6, whereas 4 and 5 are carrying tridentate trihydroborate ligands.