Catalyst-transfer cross-coupling polymerization

{
  "id": "MLC-T-CHM-001710",
  "term": "Catalyst-transfer cross-coupling polymerization",
  "field": "Chemistry",
  "definition": "A chain-growth polymerization in which every propagation step is a metal-catalyzed cross-coupling, such as nickel-catalyzed Kumada coupling of a monomer carrying both a halide and an organomagnesium group. After each coupling the catalyst stays on the chain and moves along the conjugated backbone to the new terminal carbon-halogen bond instead of dissociating, so molar mass follows the monomer-to-catalyst ratio and dispersity is low. Regioregular poly(3-hexylthiophene) is its best-known product.",
  "subject": "Polymer",
  "see_also": [
    "catalyst-transfer polymerization"
  ],
  "references": [
    "PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1140 (https://doi.org/10.1515/pac-2020-1211)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/catalyst-transfer-cross-coupling-polymerization/"
}