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Updated: Sep 30, 2025
19:58
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
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Vanadium complexes with N-heterocyclic vinylidene ligands
Bastiaan Kooij1, Zhaowen Dong1, Paul Varava1
1Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland. kay.severin@epfl.ch.
Chemical Communications (Cambridge, England)
|March 11, 2022
Summary
Researchers synthesized novel vanadium complexes using diazoolefins. These N-heterocyclic vinylidene ligands act as 6-electron donors, forming strong vanadium-carbon bonds.
Area of Science:
- Organometallic Chemistry
- Coordination Chemistry
Background:
- N-heterocyclic carbenes are versatile ligands in organometallic chemistry.
- The coordination behavior of N-heterocyclic vinylidenes is less explored.
Purpose of the Study:
- To report the synthesis and structural characterization of vanadium complexes featuring N-heterocyclic vinylidene ligands.
- To investigate the electronic properties and bonding modes of these novel ligands.
Main Methods:
- Synthesis of vanadium complexes utilizing diazoolefins as precursors.
- Single-crystal X-ray diffraction for structural determination.
- Density Functional Theory (DFT) calculations for electronic structure analysis.
Main Results:
- Successful preparation of vanadium complexes with terminal and bridging N-heterocyclic vinylidene ligands.
- Structural data confirms the ability of N-heterocyclic vinylidenes to act as 6-electron donors.
- Strong metal-carbon interactions observed due to the ligand's electronic contribution.
Conclusions:
- N-heterocyclic vinylidenes represent a new class of potent 6-electron donor ligands for transition metals.
- The strong metal-carbon interactions can lead to unique reactivity and stability in vanadium complexes.
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