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Updated: Sep 16, 2025
09:41
Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
Published on: May 29, 2018
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Low-coordinate calcium peroxide and oxide complexes
Stefan Thum1, Marcel A Schmidt1, Jens Langer1
1Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany. sjoerd.harder@fau.de.
Chemical Communications (Cambridge, England)
|July 10, 2025
Summary
A novel calcium(I) complex with bulky ligands enabled the synthesis of binuclear calcium-oxygen compounds. The unstable calcium oxide complex was formed via a solvent-free reaction.
Area of Science:
- Organometallic Chemistry
- Inorganic Synthesis
- Calcium Chemistry
Background:
- Superbulky ligands are crucial for stabilizing reactive metal centers.
- Dinitrogen (N22-) can act as a synthon in inorganic synthesis.
Purpose of the Study:
- To synthesize and characterize novel binuclear calcium complexes.
- To explore the reactivity of a calcium(I) dinitrogen complex.
Main Methods:
- Synthesis of a calcium(I) synthon with bulky β-diketiminate ligands (BDI*) and a N22- dianion.
- Reaction of the calcium(I) complex with N2O gas under solvent-free conditions.
Main Results:
- The key intermediate [(BDI*)Ca]2(N2) was synthesized.
- Binuclear calcium-peroxo and calcium-oxo complexes, (BDI*)Ca(μ2-O2)Ca(BDI*) and (BDI*)Ca(μ2-O)Ca(BDI*), were obtained.
- The calcium oxide complex was found to be unstable in solution.
Conclusions:
- A novel synthetic route to binuclear calcium-oxygen complexes was established.
- Solvent-free reactions are effective for synthesizing unstable metal-oxide species.
- The calcium(I) dinitrogen complex serves as a versatile precursor for reactive calcium compounds.
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