One Bridge, Three Bonds: A Frontier in Multiple Bonding in Heterobimetallic Complexes
Nathanael H Hunter1, Jeremiah E Stevens1, Curtis E Moore1
1Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, United States.
Inorganic Chemistry
|January 3, 2023
Summary
Researchers created a novel zirconium/cobalt complex featuring a metal-metal triple bond, stabilized by a single phosphinoamide ligand. This finding expands the possibilities for synthesizing heterobimetallic compounds with multiple metal-ligand bonds.
Area of Science:
- Inorganic Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Metal-metal multiple bonds are crucial in various chemical processes.
- Previous studies focused on multiple bridging ligands to achieve such bonds.
- Heterobimetallic complexes offer unique electronic and structural properties.
Purpose of the Study:
- To synthesize and characterize a heterobimetallic complex with a metal-metal triple bond.
- To investigate the role of a single bridging ligand in stabilizing multiple metal-metal bonds.
- To explore new synthetic routes for novel metal-metal bonded compounds.
Main Methods:
- Synthesis of a zirconium/cobalt heterobimetallic complex.
- X-ray crystallography for structural analysis.
- Density Functional Theory (DFT) and Complete-Active-Space Self-Consistent-Field (CASSCF) calculations for electronic structure determination.
Main Results:
- A single bridging phosphinoamide ligand successfully supported a Zr/Co metal-metal triple bond.
- Structural parameters and computational analyses confirmed the triple bond.
- The findings challenge the necessity of multiple bridging ligands for stabilizing such bonds.
Conclusions:
- Metal-metal multiple bonds can be formed in heterobimetallic complexes using a single bridging ligand.
- This work provides a new strategy for designing and synthesizing compounds with multiple metal-metal bonds.
- The study opens avenues for exploring novel heterobimetallic complexes with unique bonding characteristics.
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