CE07 - Chimie moléculaire

Boron-Containing Ligands: A Gateway to Low-valent Open-Shell Iron and Gold Complexes – FeBAu

Submission summary

Low-valent open-shell transition metal complexes remain rare and underexplored. This is largely due to the difficulty to study coordinatively unsaturated and paramagnetic species. At the same time, their peculiar properties are highly sought after because: i) low valent complexes are often transient species in catalytic transformations triggering key activation processes and ii) their open-shell structure is a cornerstone of 1-electron reactivity used by nature in enzymatic transformations. On the other hand, transition metal complexes featuring boron-containing ligands have witnessed spectacular progress recently, highlighting specific properties in marked contrast to those of other ligand frameworks.
However, this chemistry is essentially limited to coordinatively saturated, closed-shell complexes. We believe the field is now mature to explore more challenging species. The combination of a low-valent transition featuring high electron density with a Lewis acidic boron moiety is very appealing in order to finely tune the electronic structure and reactivity of the targeted complexes. The FeBAu project aims at demonstrating the interest and potential of boron-containing ligands to control and play with spin density localization (metal/ligand-centered or delocalized species). The reactivity of the low-valent complexes will be investigated and exploited, in particular towards radical paths and redox/chemical non-innocence.

Project coordination

Sebastien Bontemps (Centre national de la recherche scientifique)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

LHFA Centre national de la recherche scientifique
LCC Centre national de la recherche scientifique

Help of the ANR 413,258 euros
Beginning and duration of the scientific project: October 2022 - 48 Months

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