3661-66-3Relevant academic research and scientific papers
How big is a Cp? Cycloheptatrienyl zirconium complexes with bulky cyclopentadienyl and indenyl ligands
Gloeckner, Andreas,Bauer, Heiko,Maekawa, Miyuki,Bannenberg, Thomas,Daniliuc, Constantin G.,Jones, Peter G.,Sun, Yu,Sitzmann, Helmut,Tamm, Matthias,Walter, Marc D.
, p. 6614 - 6624 (2012/07/13)
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.
