Metallocene(III) tetrahydridoborates of the Group 3Aelements and the X-ray structure of [Sc{η-C5H3(SiMe3)2}2(µ-H)2BH2]
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 5,p. 206-207
- https://doi.org/10.1039/c39830000206
Abstract
Complexes of a range of group 3A metals (Ln) of formula [Ln{η-C5H3(SiMe3)2}2(BH4)(thf)n](thf = tetrahydrofuran, n= 1 or, for Ln = Sc, n= 0) have either a (µ-H)2(for the smaller metals: Ln = Sc, Y, or Yb) or a (µ-H)3(Ln = La, Pr, Nd, or Sm) bridge, and only with the smallest of these (Sc) is the BH4 – ligand non-fluxional (11B n.m.r.spectroscopy) at ambient temperature although rapid bridging hydrogen ⇌ terminal hydrogen exchange occurs at 100 °C; the X-ray crystal structure of this title Sc compound shows Sc–H 2.03 (4) and Sc…. B 2.52(3)Å and confirms the bidentate mode of BH4 – bonding.Keywords
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