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![[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
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[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
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Robust dicopper(i) μ-boryl complexes supported by a dinucleating naphthyridine-based ligand.
Pablo Ríos1, Matthew S See1, Rex C Handford1
1Department of Chemistry, University of California Berkeley USA.
Chemical Science
|June 27, 2022
Summary
Researchers isolated stable dicopper(i) boryl complexes using a dinucleating ligand. These complexes demonstrate exceptional thermal stability and play a key role in activating carbon-hydrogen bonds in catalysis.
Area of Science:
- Organometallic Chemistry
- Catalysis
- Inorganic Chemistry
Background:
- Copper boryl species are crucial reactive intermediates in copper-catalyzed C-H borylation.
- Isolation and characterization of these intermediates have been historically challenging.
Purpose of the Study:
- To isolate and characterize stable copper boryl complexes.
- To investigate the role of these complexes in C-H borylation reactions.
- To understand the factors contributing to their stability.
Main Methods:
- Synthesis of dicopper(i) boryl complexes using the dinucleating ligand DPFN (2,7-bis(fluoro-di(2-pyridyl)methyl)-1,8-naphthyridine).
- Reaction of diboranes with a dicopper(i) alkoxide precursor.
- Thermal stability studies in solution.
- Reactivity studies focusing on C(sp)-H bond activation.
- X-ray diffraction and computational studies for structural and electronic analysis.
Main Results:
- Isolation of two thermally stable dicopper(i) boryl complexes: [(DPFN)Cu2(μ-Bpin)][NTf2] and [(DPFN)Cu2(μ-Bcat)][NTf2].
- Demonstrated exceptional thermal stability of the boryl complexes in solution up to 100 °C.
- Confirmed the role of these complexes in the activation of C(sp)-H bonds.
- Detailed structural and electronic descriptions provided via X-ray diffraction and computational methods.
Conclusions:
- The dinucleating ligand DPFN is key to the remarkable stability of the isolated dicopper(i) boryl complexes.
- These stable complexes serve as valuable intermediates for studying copper-catalyzed C-H borylation.
- The findings offer new insights into the mechanism and stability of copper boryl species in catalysis.
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