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Updated: May 24, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Carbon(sp(3))-fluorine bond-forming reductive elimination from palladium(IV) complexes
Joy M Racowski1, J Brannon Gary, Melanie S Sanford
1Department of Chemistry, University of Michigan, Ann Arbor, 48109, USA.
New palladium(IV)-fluoride complexes enable selective C(sp(3))-F coupling reactions. These complexes show remarkable water insensitivity, simplifying synthetic procedures and expanding catalytic applications in fluorination chemistry.
Area of Science:
- Organometallic Chemistry
- Fluorination Chemistry
Background:
- Palladium catalysis is crucial for C-F bond formation.
- Developing stable and selective palladium catalysts for fluorination remains a challenge.
Purpose of the Study:
- To synthesize and characterize novel palladium(IV)-fluoride complexes.
- To investigate the utility of these complexes in C(sp(3))-F coupling reactions.
- To elucidate the reaction mechanism.
Main Methods:
- Synthesis of novel Pd(IV)-fluoride complexes.
- Application of these complexes in C(sp(3))-F coupling reactions.
- Preliminary mechanistic investigations.
Main Results:
- Successful synthesis of water-insensitive Pd(IV)-fluoride complexes.
- High selectivity observed in C(sp(3))-F coupling reactions.
- Mechanistic studies suggest pyridine dissociation followed by direct C-F coupling at the palladium center.
Conclusions:
- Pd(IV)-fluoride complexes are effective catalysts for selective C(sp(3))-F coupling.
- The developed catalytic system offers a robust method for fluorination.
- The mechanistic insights provide a foundation for further catalyst development.
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