作者
Michael CW Chan, Steven CF Kui, Jacqueline M Cole, Garry J McIntyre, Shigekazu Matsui, Nianyong Zhu, Ka‐Ho Tam
发表日期
2006/3/8
期刊
Chemistry–A European Journal
卷号
12
期号
9
页码范围
2607-2619
出版商
WILEY‐VCH Verlag
简介
A family of Group 4 post‐metallocene catalysts, supported by fluorine‐functionalized tridentate ligands with the fluorine substituent in the locality of the metal center, is described. For the first time, the contentious CH⋅⋅⋅FC interaction has been characterized by a neutron diffraction study, which has allowed the position of the hydrogen atoms to be accurately determined. The nature of the weak intramolecular CH⋅⋅⋅FC contacts in these complexes in solution and the solid state was probed by using multinuclear NMR spectroscopy in tandem with neutron and X‐ray crystallography. Evidence is presented to demonstrate that the spectroscopic CH⋅⋅⋅FC coupling occurs “through‐space” rather than “through‐bond” or by M⋅⋅⋅F coordination. The titanium catalysts exhibit excellent activities and high co‐monomer incorporation in olefin polymerization. The observed intramolecular CH⋅⋅⋅FC …
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MCW Chan, SCF Kui, JM Cole, GJ McIntyre, S Matsui… - Chemistry–A European Journal, 2006