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Robust dicopper( i ) μ-boryl complexes supported by a dinucleating naphthyridine-based ligand
- Source :
- Chemical science, vol 13, iss 22
-
Abstract
- Copper boryl species have been widely invoked as reactive intermediates in Cu-catalysed C-H borylation reactions, but their isolation and study have been challenging. Use of the robust dinucleating ligand DPFN (2,7-bis(fluoro-di(2-pyridyl)methyl)-1,8-naphthyridine) allowed for the isolation of two very thermally stable dicopper(i) boryl complexes, [(DPFN)Cu2(μ-Bpin)][NTf2] (2) and [(DPFN)Cu2(μ-Bcat)][NTf2] (4) (pin = 2,3-dimethylbutane-2,3-diol; cat = benzene-1,2-diol). These complexes were prepared by cleavage of the corresponding diborane via reaction with the alkoxide [(DPFN)Cu2(μ-O t Bu)][NTf2] (3). Reactivity studies illustrated the exceptional stability of these boryl complexes (thermal stability in solution up to 100 °C) and their role in the activation of C(sp)-H bonds. X-ray diffraction and computational studies provide a detailed description of the bonding and electronic structures in these complexes, and suggest that the dinucleating character of the naphthyridine-based ligand is largely responsible for their remarkable stability.
- Subjects :
- Chemical Sciences
General Chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 20416539 and 20416520
- Volume :
- 13
- Issue :
- 22
- Database :
- OpenAIRE
- Journal :
- Chemical Science
- Accession number :
- edsair.doi.dedup.....2f659b23249f6c82957f1b1f98f47b54
- Full Text :
- https://doi.org/10.1039/d2sc00848c