The Base-Catalyzed Alkylation of Fluorene and Indene with Alcohols and Diols
作者:Henry E. Fritz、David W. Peck、Marion A. Eccles、Kenneth E. Atkins
DOI:10.1021/jo01019a009
日期:1965.8
How big is a Cp? Cycloheptatrienyl zirconium complexes with bulky cyclopentadienyl and indenyl ligands
作者:Andreas Glöckner、Heiko Bauer、Miyuki Maekawa、Thomas Bannenberg、Constantin G. Daniliuc、Peter G. Jones、Yu Sun、Helmut Sitzmann、Matthias Tamm、Marc D. Walter
DOI:10.1039/c2dt12132h
日期:——
A combination of phase-transfer and traditional alkylation strategies has been employed to synthesise sterically encumbered 1,3-di(cyclohexyl) and 1,3-di(tert-butyl) substituted indenes in multi-gram quantities. These indenyl ligands and sterically demanding alkyl cyclopentadienyl ligands have been used to prepare a series of [(η7-C7H7)Zr(η5-L)] (L = Cp and Ind) complexes by straightforward salt metathesis between [(η7-C7H7)ZrCl(tmeda)] and the corresponding sodium indenide or cyclopentadienide. All of these Zr complexes have been characterized by elemental analysis, NMR spectroscopy and single crystal X-ray diffraction. The structural information derived from these studies was employed to evaluate the steric demand of these ligands in a realistic manner.