Issue 28, 2020

Electronic effect of a perfluorinated β-diketiminate ligand on the bonding nature of copper carbonyl complexes

Abstract

Two copper complexes 17Fnac2Cu(C6H6) (3) and 17Fnac2CuCO (4) containing the monoanionic, perfluorinated β-diketiminate 17Fnac2 ligand (1) (17Fnac2 = FC[C(CF3)N(C6F5)]2) were synthesized and characterized by IR and NMR spectroscopy (1H, 13C, 19F), cyclovaltammometry (CV), elemental analysis and single crystal X-ray diffraction. The perfluorinated 17Fnac2 ligand marginally reduces the π-back-bonding capacity of the copper centre to the carbonyl group in 4 when compared with the corresponding 16Fnac2 substituted complexes but substantially when compared with the fluorine free substituted derivatives. Quantum chemical calculations gave deeper insight into the bonding situation of this carbonyl complex, while CV studies were performed to determine the oxidation potential of 3 in solution. Based on these data, the influence of the degree of fluorination in different β-diketimine ligands on the electronic nature of the corresponding copper complexes is discussed.

Graphical abstract: Electronic effect of a perfluorinated β-diketiminate ligand on the bonding nature of copper carbonyl complexes

Supplementary files

Article information

Article type
Paper
Submitted
30 5 2020
Accepted
30 6 2020
First published
30 6 2020

Dalton Trans., 2020,49, 9773-9780

Electronic effect of a perfluorinated β-diketiminate ligand on the bonding nature of copper carbonyl complexes

K. Huse, H. Weinert, C. Wölper and S. Schulz, Dalton Trans., 2020, 49, 9773 DOI: 10.1039/D0DT01943G

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