Cesium Reduction of a Lithium Diamidochloroberyllate
Kyle G Pearce1, Michael S Hill1, Mary F Mahon1
1Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K.
Organometallics
|February 16, 2024
Summary
Elemental cesium reacts with lithium chloroberyllate, activating the solvent. This reaction forms hydridoberyllium species and polymeric cesium benzylberyllate, demonstrating novel beryllium chemistry.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Main Group Chemistry
Background:
- Previous studies showed lithium and sodium metal reduction of beryllium complexes.
- The role of beryllium in solvent activation remained unclear.
Purpose of the Study:
- To investigate the reaction of elemental cesium with a dimeric lithium chloroberyllate.
- To explore the potential formation of cesium phenylberyllate species.
- To understand the mechanism of beryllium-centered solvent activation.
Main Methods:
- Reaction of elemental cesium with [{SiNDipp}BeClLi]2 in C6D6 at room temperature.
- Analogous reaction in toluene.
- Characterization of reaction products.
Main Results:
- Activation of the arene solvent (benzene) was observed.
- Formation of hydridoberyllium species was confirmed.
- A polymeric cesium benzylberyllate, [Cs({SiNDipp}BeCH2C6H5)]∞, was isolated from the toluene reaction.
- Generation of a cesium phenylberyllate was not confirmed.
Conclusions:
- Cesium metal can induce beryllium-centered solvent activation.
- The reaction necessitates the formation of hydridoberyllium species.
- Low oxidation state beryllium radical anion intermediates are proposed to activate toluene C-H bonds.
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