Evidence for Non-Innocence of a β-Diketonate Ligand

Morten Gotthold Vinum, Laura Voigt, Colby Bell, Dmytro Mihrin, René Wugt Larsen, Kensha Marie Clark, Kasper S. Pedersen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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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 Cr(II) spontaneously affords Cr(III) and a reduced beta-diketonate ligand radical, as evidenced by crystallographic analysis, magnetic measurements, optical spectroscopy, reactivity studies, and DFT calculations. The possibility of harnessing ß-diketonates as electron reservoirs opens up possibilities for new metal-ligand concerted reactivity in the ubiquitous β-diketonate coordination chemistry.
Original languageEnglish
JournalChemistry - A European Journal
Issue number10
Pages (from-to)2143-2147
Publication statusPublished - 2020


  • Non-innocent ligands
  • Chromium
  • Bidentate ligands
  • Magnetic properties


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