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Start Over Author "Changguang Yao" Publisher wiley
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2. Highly Isoselective Coordination Polymerization ofortho-Methoxystyrene with β-Diketiminato Rare-Earth-Metal Precursors

Author

Changguang Yao, Fei Lin, Shihui Li, Dongmei Cui, Xinhua Wan, Rong Wang, Zichuan Wang, Chunji Wu, Meiyan Wang, and Dongtao Liu

Subjects
Cationic polymerization, General Chemistry, Catalysis, Styrene, Metal, chemistry.chemical_compound, chemistry, Polymerization, visual_art, Polymer chemistry, visual_art.visual_art_medium, Copolymer, Coordination polymerization, Chelation
Abstract

Stereoselective coordination/insertion polymerization of the polar ortho-methoxystyrene has been achieved for the first time by using the cationic beta-diketiminato rare-earth-metal species. High activity and excellent isoselectivity (mmmm>99%) were acheived. The unmasked Lewis-basic methoxy group does not poison the Lewis-acidic metal center, but instead activates the polymerization through sigma-pi chelation to the active species together with the vinyl group, thus lower the coordination and activation energies as compared with those of styrene derivatives lacking the methoxy group.

Published
2015

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