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The research aims to evaluate the catalytic efficiency of NHC-supported niobium(V)–alkylidene catalysts for ROMP.

April 18, 2026ACS Polymers AuOpen Access

NHC-Supported (Arylimido)niobium(V)–Alkylidene Catalysts Exhibiting Exceptionally High Catalytic Activities for ROMPs

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Catalysts demonstrate high effectiveness for ring-opening metathesis polymerization of norbornene, suggesting efficient polymer production.

The research aims to evaluate the catalytic efficiency of NHC-supported niobium(V)–alkylidene catalysts for ROMP.
Synthesis of NHC-supported niobium(V)–alkylidene catalysts with perhalophenoxide ligands.
Examination of catalytic activities in ROMP of norbornene.
Measurement of polymer properties such as molecular weight and turnover frequency.
Catalysts achieve M_n values between 2.02 and 3.84 × 106.
ROMP reactions complete within 5 seconds at 25 °C with TOF exceeding 4260 s–1.
Process yields cis-syndiotactic polymers without catalyst decomposition.

Loekukot et al. (2026) studied this question.

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Catalysts demonstrate high effectiveness for ring-opening metathesis polymerization of norbornene, suggesting efficient polymer production.