Synthesis and structure of ansa-metallocene complexes (M=ZrCl2, TiCl2, YCl, and LuCl) containing the bis(2-methyl-4,5,6,7-tetrahydroinden-yl)dimethylsilane ligand
摘要:
The three step synthesis of 2-methyl-4,5,6,7-tetrahydro-1H-indene from cyclohexyl methacrylate is described [(a) PPA cyclization: (b) LiAlH4 reduction. (c) HCl dehydration]. This annelated trisubstituted cyclopentadiene was bridged selectively to form ethylene- or dimethylsilyl-bridged bis(2-methyl-4,5,6,7-tetrahydro-1H-inden-1-yl) ligands. Metal complexes (M = ZrCl2, TiCl2 YCl, and LuCl) of the bis(2-methyl-4,5,6,7-tetrahydroinden-1-yl)dimethylsilane ligand were formed as meso/dl stereoisomeric mixtures in ratios from 1:1 to 2:1 dl:meso. (C) 2000 Published by Elsevier Science S.A. All rights reserved.
Synthesis of ring-substituted bis-η5-cyclopentadienyl derivatives of the Group IV elements containing the bicyclic ligands η5-C5H3(1,2-CH2–)n, n=4, 5, or 6
作者:Eleonora Polo、Ronan M Bellabarba、Giansiro Prini、Orazio Traverso、Malcolm L.H Green
DOI:10.1016/s0022-328x(98)01042-0
日期:1999.4
The synthesis of unsubstituted and substituted bicyclic η5-cyclopentadienyl ligands and their Group IV metal complexes [Mη5-C5H3(1,2-CH2–)n}2Cl2], where n=4, 5, 6 and M=Ti, Zr, Hf, is reported. An example of an ansa-bridged zirconium analogue is also described.