Rare-earth-metal-mediated coordination-addition polymerization

{
  "id": "MLC-T-CHM-009929",
  "term": "Rare-earth-metal-mediated coordination-addition polymerization",
  "field": "Chemistry",
  "definition": "A coordination polymerization in which chains grow at a rare-earth metal center, with an unsaturated ester or amide monomer first binding to the metal and then adding to the chain end in a Michael-type step. Group 3 and lanthanide metallocene enolates are the usual catalysts, and they are known to polymerize methacrylates with living character. Unlike rare-earth diene polymerization, which proceeds by insertion into a metal-carbon bond, the monomers here are polar.",
  "synonyms": [
    "lanthanide-mediated group-transfer polymerization",
    "rare-earth-metal-mediated coordination polymerization",
    "rare-earth-metal-mediated group-transfer polymerization"
  ],
  "subject": "Polymer",
  "references": [
    "PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1139 (https://doi.org/10.1515/pac-2020-1211)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/rare-earth-metal-mediated-coordination-addition-polymerization/"
}