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A Molecular Complex with a Formally Neutral Iron Germanide Motif (Fe<sub>2</sub>Ge<sub>2</sub>)
Abstract
We report the synthesis and isolation of a stable complex containing the formally neutral Fe<sub>2</sub>Ge<sub>2</sub> motif, which is stabilized by the coordination of an N-heterocyclic carbene to the germanium and of carbon monoxide to the iron center. [(NHC<sup><i>i</i>Pr<sub>2</sub>Me<sub>2</sub></sup>)GeFe(CO)<sub>4</sub>]<sub>2</sub> is obtained by reduction of the NHC<sup><i>i</i>Pr<sub>2</sub>Me<sub>2</sub></sup>-coordinated dichlorogermylene adduct of Fe(CO)<sub>4</sub>, which in turn is obtained from the reaction of Fe<sub>2</sub>(CO)<sub>9</sub> with GeCl<sub>2</sub>·NHC<sup><i>i</i>Pr<sub>2</sub>Me<sub>2</sub></sup> (NHC<sup><i>i</i>Pr<sub>2</sub>Me<sub>2</sub></sup> = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene). The solid-state structure of the title compound reveals two distinct coordination modes for the Fe(CO)<sub>4</sub> fragments: bridging (π-type) and terminal (σ-type). In solution, the rapid equilibrium between the two modes was resolved by NMR at −35 °C. Reaction with propylene sulfide at room temperature affords the sulfide-bridged digermanium complex with two terminal Fe(CO)<sub>4</sub> moieties- Text
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- Fe 2Ge motif
- NHCiPr 2Me dichlorogermylene adduct
- Fe 2Ge report
- coordination modes
- room temperature
- iron center
- title compound
- NMR
- carbon monoxide
- NHCiPr 2Me
- Molecular Complex
- propylene sulfide
- Neutral Iron Germanide Motif