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Published on: January 19, 2016
A tetracoordinated rhodium aminyl radical complex
Pascal Maire1, Martin Königsmann, Anandaram Sreekanth
1Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH-Zürich, CH-8093 Zürich, Switzerland.
Journal of the American Chemical Society
|May 18, 2006
Summary
A novel rhodium aminyl radical complex was synthesized and characterized. Its unpaired electron is delocalized across the rhodium and nitrogen atoms, confirmed by electron paramagnetic resonance spectroscopy and computational studies.
Area of Science:
- Organometallic Chemistry
- Spin Chemistry
Background:
- Rhodium complexes are versatile catalysts.
- Aminyl radicals are reactive intermediates.
Purpose of the Study:
- Synthesize and characterize a novel rhodium aminyl radical complex.
- Investigate the electronic structure and reactivity of the complex.
Main Methods:
- Synthesis of the rhodium aminyl radical complex.
- Detailed characterization using pulse electron paramagnetic resonance (EPR) spectroscopy.
- Density Functional Theory (DFT) calculations to model electronic structure.
Main Results:
- Successful synthesis and characterization of the [16 + 1] valence electron configured rhodium aminyl radical complex.
- Pulse EPR and DFT calculations revealed delocalization of the unpaired electron over the rhodium metal center and two adjacent nitrogen atoms.
- H-abstraction reactions demonstrated predominant spin density localization on the nitrogen atoms.
Conclusions:
- The rhodium aminyl radical complex exhibits unique electronic properties with delocalized spin density.
- The findings provide insights into the behavior of metal-centered radicals.
- This study opens avenues for exploring similar radical complexes in catalysis and materials science.
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