without changing your settings we'll assume you are happy to receive all RSC cookies.
You can change your cookie settings by navigating to our Privacy and Cookies page and following the instructions. These instructions
are also obtainable from the privacy link at the bottom of any RSC page.
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.
Fetching data from CrossRef. This may take some time to load.