Hydride Transfer Reactivity of an Open-Shell [Fe₃H]^- Cluster.

Area of Science:

• Inorganic Chemistry
• Organometallic Chemistry
• Catalysis

Background:

• Iron-hydride clusters are of interest due to their potential catalytic applications.
• Developing stable and reactive iron-hydride complexes remains a synthetic challenge.

Purpose of the Study:

• To synthesize and characterize a novel high-spin iron-hydride cluster.
• To investigate the reactivity of the synthesized cluster with small molecules.
• To evaluate the catalytic potential of the iron-hydride cluster in hydrosilylation reactions.

Main Methods:

• Synthesis of the iron-hydride cluster via metathesis reactions.
• Characterization using solution (NMR, cyclic voltammetry) and solid-state techniques (Mössbauer spectroscopy, X-ray crystallography).
• Reactivity studies with unsaturated small molecules and catalytic hydrosilylation of aldehydes.

Main Results:

• Successfully synthesized and characterized the high-spin iron-hydride cluster [K(C222)][(tbsL)Fe3(μ3-H)].
• Demonstrated reactivity of the anionic hydride cluster with aldehydes, isonitriles, and alkynes.
• Showcased the cluster's efficacy as a catalyst for the hydrosilylation of aldehydes to silyl ethers.

Conclusions:

• The high-spin iron-hydride cluster is a stable and reactive species.
• The cluster can activate small unsaturated molecules and catalyze important organic transformations.
• This work expands the scope of iron-based catalysts for reductive processes.