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Cooperative Bond Activation and Catalysis by Tetrylene-Stabilized Low-Valent Main-Group Compounds.
Xi Chen1, Ming Chen1, Zhenbo Mo1
1State Key Laboratory and Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, Academy for Advanced Interdisciplinary Studies, College of Chemistry, Nankai University, Tianjin 300071, China.
Accounts of Chemical Research
|June 20, 2026
Summary
Researchers developed new low-valent main-group compounds that activate challenging bonds through cooperative effects. These compounds show promise as catalysts for important chemical reactions like carbon dioxide reduction.
Area of Science:
- Main-group chemistry
- Organometallic chemistry
- Catalysis
Background:
- Main-group molecules offer potential for bond activation and catalysis, mimicking transition metals.
- Limited electronic versatility of main-group elements necessitates innovative strategies for expanded reactivity.
- Cooperative effects in main-group compounds, like frustrated Lewis pairs (FLPs), enhance reactivity.
Purpose of the Study:
- To synthesize and investigate novel low-valent main-group compounds stabilized by heavier tetrylenes.
- To explore the cooperative bond activation capabilities of these new main-group compounds.
- To demonstrate their applications as precatalysts in challenging chemical transformations.
Main Methods:
- Design and synthesis of multidentate silylene ligands for stabilizing boron(I) and aluminum(I) species (borylene and aluminylene).
- Isolation of zerovalent group 14 compounds (stannylone, plumbylone) using a bis(germylenyl)carborane ligand.
- Evaluation of cooperative effects between low-valent main-group centers (B(I)/Si(II), Al(I)/Si(II), Sn(0)/Ge(II), Pb(0)/Ge(II)) for bond cleavage.
Main Results:
- Stabilization of boron(I) and aluminum(I) compounds, enabling cleavage of N-H, C=O, N=O, and C≡O bonds.
- Demonstrated catalytic activity in CO2 reduction and reductive coupling of nitrosoarenes.
- Isolation of zerovalent Sn(0) and Pb(0) compounds, facilitating N=O bond cleavage in nitrous oxide and nitro compounds via cooperative Sn(0)/Ge(II) and Pb(0)/Ge(II) interactions.
- Stannylone effectively catalyzed deoxygenation of nitrous oxide and nitro compounds.
Conclusions:
- Cooperative interactions between multiple low-valent main-group centers unlock unique reactivity for bond activation.
- Novel main-group compounds serve as effective precatalysts for challenging reactions, including CO2 reduction and deoxygenation.
- These findings establish a proof-of-concept for developing versatile main-group platforms in catalysis.
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