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Robust dicopper(I) µ-boryl complexes supported by a dinucleating naphthyridine-based ligand
- Publication Year :
- 2022
- Publisher :
- American Chemical Society (ACS), 2022.
-
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-OtBu)][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 species, and suggest that the dinucleating character of the naphthyridine-based ligand is largely responsible for their remarkable stability.
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi...........d75be3f6f4647ede4c6c6a318f9361b8
- Full Text :
- https://doi.org/10.26434/chemrxiv-2022-t86ws