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Carbene-Decorated Geometrically Constrained Borylenes for Bond Activations.
Barsha Chakraborty1, Daniel González-Pinardo2, Israel Fernández2
1Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India.
Inorganic Chemistry
|July 29, 2024
Summary
This study introduces novel borylenes stabilized by carbenes, demonstrating element-ligand cooperativity for activating strong chemical bonds. These findings open new avenues in main group chemistry and catalysis.
Area of Science:
- Organometallic Chemistry
- Main Group Chemistry
- Computational Chemistry
Background:
- Metal-ligand cooperativity is a well-established concept in catalysis.
- Element-ligand cooperativity involving main group elements remains underexplored.
- Borylenes are reactive boron species with potential for unique reactivity.
Purpose of the Study:
- To computationally design and investigate novel geometrically constrained borylenes stabilized by carbenes.
- To explore the potential for borylene-ligand cooperativity in these systems.
- To analyze the capability of these borylenes in activating strong chemical bonds.
Main Methods:
- Density Functional Theory (DFT) calculations were employed.
- Geometrically constrained borylenes supported by various carbenes were designed.
- Electronic properties (nucleophilicity, electrophilicity) were analyzed.
- Bond activation processes, including cycloaddition and B-H/Si-H activation, were studied.
Main Results:
- The designed borylenes exhibit enhanced nucleophilicity and electrophilicity.
- Evidence for borylene-ligand cooperativity was computationally demonstrated.
- Cooperative activation of acetylene via cycloaddition across the B-C bond was observed.
- Activation of strong B-H and Si-H bonds was facilitated by cooperative effects.
Conclusions:
- Geometrically constrained bis(carbene)-stabilized borylenes are promising for element-ligand cooperativity.
- These systems can activate enthalpically strong bonds through cooperative mechanisms.
- This work presents the first theoretical examples of such cooperative borylene systems.
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