Abstract
σ-Bond metathesis reactions between [(6-Dipp)CuOtBu] (6-Dipp=:C({Dipp}NCH2)2CH2, Dipp=2,6-iPr2−C6H3) and three diboranes gave access to three new copper(I) boryl complexes [(6-Dipp)CuBcat], [(6-Dipp)CuBneop], and [(6-Dipp)CuBhex] (cat=1,2-O2C6H4; neop=(OCH2)2C(CH3)2; hex=OC(CH3)HCH2C(CH3)2O). Whilst [(6-Dipp)CuBcat] and [(6-Dipp)CuBneop] formed rapidly in toluene, access to [(6-Dipp)CuBhex] required heating to 60 °C for days. The complexes were characterised by single-crystal X-ray crystallography which showed in all three cases that the systems were monomers and distorted-linear at the copper atom. The stability of [(6-Dipp)CuBneop] was found to be comparable to that of [(IPr*)Cu-Bneop] (IPr*=1,3-bis(2,6-(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene); it persisted in solution for days with no sign of decomposition. [(6-Dipp)CuBhex] is a rare crystallographically characterised example of a complex containing a boryl anion supported by the hexylene glycolato ligand.
Original language | English |
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Article number | e202300043 |
Journal | European Journal of Inorganic Chemistry |
Volume | 26 |
Issue number | 13 |
Early online date | 27 Feb 2023 |
DOIs | |
Publication status | Published - 2 May 2023 |
Bibliographical note
Funding Information:DJL thanks the Royal Society for the support of a University Research Fellowship. We wish to thank the University of Bath for funding and MC for use of their analytical facilities. 2
Royal Society - URF\R1\1910
Data Availability Statement
The data that support the findings of this study are available in the supplementary material of this article.Funding
DJL thanks the Royal Society for the support of a University Research Fellowship. We wish to thank the University of Bath for funding and MC for use of their analytical facilities. 2
Keywords
- boron
- boryl anion
- carbene ligands
- copper
- ring-expanded N-heterocyclic carbene
ASJC Scopus subject areas
- Inorganic Chemistry