Chain-transfer process that proceeds by a one-step substitution reaction.
Note: In radical polymerization the process is called homolytic substitution chain transfer and reaction is by a
\(\rm{S}_{\rm{H}}2\) mechanism. An example of a
chain-transfer agent that reacts by substitution chain transfer is a thiol.
Example: A chain-transfer agent that reacts by substitution chain transfer is a thiol.
Source:
PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1126 (https://doi.org/10.1515/pac-2020-1211)