title: Sterically demanding hetero-substituted [2]borametallocenophanes of group IV metals: synthesis, structure and reactivity.
abstract: We report the synthesis and characterisation of unprecedented unstrained [2]diborametallocenophanes of zirconium and hafnium that bear the bulky octamethylfluorenyl (η(5)-C(29)H(36)) system, the proligands of which were pre-constructed by a two-step synthesis. The compounds were fully characterised by NMR spectroscopy, MALDI-TOF mass spectrometry and X-ray diffraction analysis. Typical reactivities relevant to olefin polymerisation such as methylation and chloride abstraction were also investigated. Finally, a sterically demanding bis(octamethylfluorenyl) metallocene was prepared.
authors: Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@mail.uni-wuerzburg.de
authors: Holger
authors: H
authors: Braunschweig
authors: Rainer
authors: R
authors: Dörfler
authors: Jan
authors: J
authors: Mies
authors: Andreas
authors: A
authors: Oechsner