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| Version | Summary | Created by | Modification | Content Size | Created at | Operation |
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| 1 | Helena Kang | -- | 173 | 2026-09-23 04:53:56 |
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Monomer insertion at a metal center that remains bound to the growing chain defines coordination polymerization. The catalytic site coordinates the monomer, inserts it into a metal–carbon (or metal–alkoxide) bond, and regenerates the same insertion-competent species. Single-site metal catalysts polymerize polar vinyl monomers by this coordination–insertion sequence, in contrast to radical or ionic addition to the same alkenes [1]. Living coordination polymerization of a bicyclic lactone proceeds by repeated insertion at the metal–alkoxide and can produce a chemically recyclable polyester [2]. Because the metal mediates every addition, the shape of the molecular-weight distribution can be engineered by modulating initiation, exchange, or the number of active sites [3]. Classic Ziegler–Natta and metallocene olefin polymerizations belong to the same class. The concept excludes purely ionic polymerizations in which no coordinating metal participates in the insertion step and excludes step-growth polycondensations. Stereochemistry (tacticity, comonomer incorporation) is set in the insertion transition state at the metal.
References
- Eugene Y.-X. Chen; Coordination Polymerization of Polar Vinyl Monomers by Single-Site Metal Catalysts. Chem. Rev. 2009, 109, 5157-5214. [CrossRef]
- Jian‐Bo Zhu; Eugene Y.‐X. Chen; Living Coordination Polymerization of a Six‐Five Bicyclic Lactone to Produce Completely Recyclable Polyester. Angew. Chem. Int. Ed. Engl. 2018, 57, 12558-12562. [CrossRef]
- Renee J. Sifri; Omar Padilla-Vélez; Geoffrey W. Coates; Brett P. Fors; Controlling the Shape of Molecular Weight Distributions in Coordination Polymerization and Its Impact on Physical Properties. J. Am. Chem. Soc. 2019, 142, 1443-1448. [CrossRef]
