Issue 58, 2024

Pyrazole carbodithiolate-driven iterative RAFT single-additions

Abstract

In this Communication, we comprehensively investigated substituent effects relevant to iterative reversible activation fragmentation chain transfer (RAFT) single unit monomer insertion (SUMI) reactions. Through the use of the pyrazole carbodithiolate (PCDT) “Z-group” as the chain transfer component in RAFT SUMI, we show the importance of “Z-group” effects and its interplay with “R-group” (the carbon-centred radical precursor) effects. We also expanded the scope of RAFT SUMI to new monomer types and sequences thereof. As such, the C–S bond dissocation/reformation steps were found to be crucial factors in SUMI, and it was found that general substituent effects must be wholistically examined for every step of this reaction. This stands in contrast with conventional knowledge of RAFT polymerisation, where the main consideration is often centred around the propagation stage, i.e., the key C–C bond formation step. Indeed, contrary to SUMI, the latter characteristic was observed in the analogous alternating copolymerisation.

Graphical abstract: Pyrazole carbodithiolate-driven iterative RAFT single-additions

Supplementary files

Article information

Article type
Communication
Submitted
08 may 2024
Accepted
24 iyn 2024
First published
24 iyn 2024

Chem. Commun., 2024,60, 7443-7446

Pyrazole carbodithiolate-driven iterative RAFT single-additions

K. Hakobyan, B. Noble and J. Xu, Chem. Commun., 2024, 60, 7443 DOI: 10.1039/D4CC02219J

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