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Construction of Bimetallic and Trimetallic Aggregates with a [Y(COT)2]- Building Block: Solid-State Structures and
Zheng Zhou1,2, Aaron J Babson1, Zheng Wei1
1Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States.
Organometallics
|September 26, 2025
Summary
New bimetallic and trimetallic complexes featuring the [Y-(COT)2]- unit were synthesized. Structural and spectroscopic analyses revealed diverse coordination environments and solution behaviors of these novel organometallic compounds.
Area of Science:
- Organometallic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- The [Y-(COT)2]- unit serves as a versatile building block in organometallic chemistry.
- Exploring diverse coordination environments is crucial for understanding metal-ligand interactions and developing new materials.
Purpose of the Study:
- To synthesize and characterize novel bimetallic and trimetallic complexes incorporating the [Y-(COT)2]- moiety.
- To investigate the structural diversity and solution behavior of these complexes in different coordination environments.
Main Methods:
- Synthesis of novel bimetallic and trimetallic complexes.
- Full characterization using X-ray crystallography and multinuclear NMR spectroscopy.
Main Results:
- Four new complexes ([K([2.2.2]-cryptand)]-[Y-(COT)2], [K-(18-crown-6)-(THF)]-[Y-(COT)2], [Y2K2(COT)4(THF)4], and [YKCa-(COT)3(THF)3]) were successfully synthesized.
- X-ray crystallography revealed diverse structures, including ionic pairs, a tetradecker oligomer, and a heterotrimetallic triple-decker.
- NMR spectroscopy indicated weak interactions between the [Y-(COT)2]- unit and cationic moieties in solution.
Conclusions:
- The study successfully synthesized and characterized novel Y-based bimetallic and trimetallic complexes.
- Structural variations in COT ring orientation and Y-COT distances were observed due to external coordination.
- Solution behavior, as evidenced by NMR, suggests persistent weak interactions within the complexes.
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