Evidence for Non-Innocence of a β-Diketonate Ligand
β-Diketonates, such as acetylacetonate, are amongst the most common bidentate ligands towards elements across the entire periodic table and are considered wholly redox-inactive in their complexes. Herein we show that complexation of 1,1,1,5,5,5-hexafluoroacetylacetonate (hfac−) to CrII spontaneously affords CrIII and a reduced β-diketonate radical ligand scaffold, as evidenced by crystallographic analysis, magnetic measurements, optical spectroscopy, reactivity studies, and DFT calculations. The possibility of harnessing β-diketonates as electron reservoirs opens up possibilities for new metal–ligand concerted reactivity in the ubiquitous β-diketonate coordination chemistry.
Chemistry - A European Journal
Vinum, M., Voigt, L., Bell, C., Mihrin, D., Larsen, R., Clark, K., & Pedersen, K. (2020). Evidence for Non-Innocence of a β-Diketonate Ligand. Chemistry - A European Journal, 26 (10), 2143-2147. https://doi.org/10.1002/chem.201904899