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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
Published on: February 5, 2022
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Flash Communication: Well-Defined Paramagnetic Polyhydrido-Bridged Iron-Iridium Clusters.
Zachary Dubrawski1, Billie Shearman1, Naïme Soulé1
1Laboratory of Catalysis, Polymerization, Processes and Materials (CP2M UMR 5128), CNRS, Universite Claude Bernard Lyon 1, CPE-Lyon, Institut de Chimie de Lyon, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France.
Organometallics
|October 17, 2025
Summary
This study reports the synthesis of a stable paramagnetic polyhydrido cluster containing diiron and tetrairidium centers. This novel cluster exhibits unique reactivity and stability, expanding the known chemistry of polyhydrido transition metal complexes.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Materials Science
Background:
- Polyhydrido transition metal complexes are valuable for their diverse bonding and reactivity.
- Well-defined paramagnetic polyhydrido systems are scarce due to inherent instability.
Purpose of the Study:
- To explore the protonolysis reactivity of Cp*IrH4 with transition metal silylamides.
- To synthesize and characterize novel paramagnetic polyhydrido clusters.
Main Methods:
- Reaction of Fe-(HMDS)2(THF) with Cp*IrH4 to form the target cluster.
- Characterization using spectroscopic and analytical techniques.
- Investigating reactivity through reduction and oxidation studies.
Main Results:
- Synthesis and characterization of the paramagnetic polyhydrido diiron tetrairidium cluster [Fe-(Cp*IrH3)2]2 (1).
- Formation of an anionic species K-[Fe-(Cp*IrH3)3] (2) via a proposed disproportionation mechanism upon reduction of 1.
- Oxidation studies revealed preferential oxidation at iridium centers, not iron.
Conclusions:
- The synthesized tetrairidium diiron cluster is exceptionally stable.
- The study highlights an unexpected driving force towards this specific cluster formation.
- This work expands the scope of known paramagnetic polyhydrido complexes.
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