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• W2135193268 endingPage "2619" @default.
• W2135193268 startingPage "2607" @default.
• W2135193268 abstract "Abstract 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 CH⋅⋅⋅FC 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 CH⋅⋅⋅FC 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 CH⋅⋅⋅FC 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 CH⋅⋅⋅FC interactions are important with regards to potential applications in polyolefin catalysis because they substantiate the proposed ortho ‐F⋅⋅⋅H(β) ligand–(polymer chain) contacts derived from DFT calculations for the remarkable fluorinated phenoxyimine Group 4 catalysts. Compared with agostic and co‐catalyst⋅⋅⋅metal contacts, weak attractive noncovalent interactions between a polymer chain and a judiciously designed “active” ligand is a new concept in polyolefin catalysis." @default.
• W2135193268 created "2016-06-24" @default.
• W2135193268 creator A5010834054 @default.
• W2135193268 creator A5041783067 @default.
• W2135193268 creator A5043935367 @default.
• W2135193268 creator A5047709408 @default.
• W2135193268 creator A5061365606 @default.
• W2135193268 creator A5068607578 @default.
• W2135193268 creator A5070448032 @default.
• W2135193268 date "2006-03-01" @default.
• W2135193268 modified "2023-10-17" @default.
• W2135193268 title "Neutron and X-ray Diffraction and Spectroscopic Investigations of Intramolecular [CH⋅⋅⋅FC] Contacts in Post-Metallocene Polyolefin Catalysts: Modeling Weak Attractive Polymer–Ligand Interactions" @default.
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