Chan Michael C W
Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
Chem Asian J. 2008 Jan 4;3(1):18-27. doi: 10.1002/asia.200700226.
The notion of weak attractive ligand-polymer interactions is introduced, and its potential application, importance, and conceptual links with "cooperative" ligand-substrate interactions are discussed. Synthetic models of weak attractive ligand-polymer interactions are described, in which intramolecular weak C-H...F-C interactions (the existence of which remains contentious) have been detected by NMR spectroscopy and neutron and X-ray diffraction experiments. These C-H...F-C interactions carry important implications for the design of catalysts for olefin polymerization, because they provide support for the practical feasibility of ortho-F...H(beta) ligand-polymer contacts proposed for living Group 4 fluorinated phenoxyimine catalysts. The notion of weak attractive noncovalent interactions between an "active" ligand and the growing polymer chain is a novel concept in polyolefin catalysis.
引入了弱吸引性配体-聚合物相互作用的概念，并讨论了其潜在应用、重要性以及与“协同”配体-底物相互作用的概念联系。描述了弱吸引性配体-聚合物相互作用的合成模型，其中通过核磁共振光谱以及中子和X射线衍射实验检测到了分子内弱C-H...F-C相互作用（其存在仍存在争议）。这些C-H...F-C相互作用对烯烃聚合催化剂的设计具有重要意义，因为它们为用于活性第4族氟化苯氧基亚胺催化剂所提出的邻位-F...H(β)配体-聚合物接触的实际可行性提供了支持。“活性”配体与增长的聚合物链之间弱吸引性非共价相互作用的概念是聚烯烃催化中的一个新概念。
