How big is a Cp? Cycloheptatrienyl zirconium complexes with bulky cyclopentadienyl and indenyl ligands.
How big is a Cp? Cycloheptatrienyl zirconium complexes with bulky cyclopentadienyl and indenyl ligands.
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CP有多大？
DOI：
10.1039/c2dt12132h
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发表时间：
2012
影响因子：
4
通讯作者：
Marc D. Walter
中科院分区：
文献类型：
--
作者：
A. Glöckner;H. Bauer;Miyuki Maekawa;T. Bannenberg;C. Daniliuc;P. Jones;Yu Sun;H. Sitzmann;M. Tamm;Marc D. Walter
采用相转移和传统的烷基化反应相结合的方法合成了多克量空间位阻的1，3-二(环己基)和1，3-二(叔丁基)取代的吲哚。通过[(η(7)-C(7)H(7))η(Tmeda)]与相应的η(7)-C(7)H(7)Zr(TMeda)的直接盐异构化反应，合成了一系列[(η(7)-C(7)H(7))Zr(5)-L](L=Cp和Ind)配合物。通过元素分析、核磁共振波谱和单晶X-射线衍射法对其结构进行了表征。从这些研究中得到的结构信息被用来以现实的方式评估这些配体的空间需求。
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 [(η(7)-C(7)H(7))Zr(η(5)-L)] (L = Cp and Ind) complexes by straightforward salt metathesis between [(η(7)-C(7)H(7))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.