B(C6F5)3 as a C6F5 transfer reagent in zirconium chemistry: facile formation of the borole-bridged triple-decker complex [Zr2Cp″2(C6F5)2 {μ-η5∶η5-C4H 4BCH2-η3,κF-CHCHCHB(C 6F5)3}]
Abstract
Warming mixtures of (CpR)Zr(η3-C4H7)(η 4-C4H6) and B(C6F5)3 leads to complete transfer of all three C6F5 substituents of a B(C6F5)3 molecule to give borole-bridged triple-decker complexes with a Zr2C4B core, a zwitterionic structure and an unusually strong Zr–F donor interaction.