Coordination-addition polymerization with propagation occurring within the coordination sphere of a rare-earth metal complex.
Note: The process may also involve non-rare-earth metal complexes with a sufficiently large coordination sphere (e.g., zirconium).
Source:
PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1139 (https://doi.org/10.1515/pac-2020-1211)