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Probing Fe-V Bonding in a C3-Symmetric Heterobimetallic Complex
Samuel M Greer1,2, Johannes McKay1, Kathryn M Gramigna3
1National High Magnetic Field Laboratory , Florida State University , Tallahassee , Florida 32310 , United States.
Inorganic Chemistry
|May 1, 2018
Summary
This study investigates a novel iron-vanadium triple bond, revealing its electronic structure and ground state. The findings show a single unpaired electron primarily located on the iron atom.
Area of Science:
- Inorganic Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Direct metal-metal bonding between first-row transition metals is less explored than heavier congeners.
- Heterobimetallic complexes offer unique electronic and structural properties.
Purpose of the Study:
- To elucidate the electronic structure of a specific iron-vanadium triple-bonded complex, [V(iPrNPPh2)3FeI].
- To characterize the ground state properties of this novel Fe-V species.
Main Methods:
- High-frequency electron paramagnetic resonance (EPR) spectroscopy.
- Field- and temperature-dependent 57Fe nuclear gamma resonance (Mössbauer) spectroscopy.
- High-field electron-electron double resonance (ELFE-DOR) detected nuclear magnetic resonance (NMR).
Main Results:
- Determination of effective g̃ tensors and Fe/V electro-nuclear hyperfine interaction tensors.
- Characterization of the spin S = 1/2 ground state.
- Quantum chemical calculations supported ligand field theory analysis.
Conclusions:
- The S = 1/2 ground state arises from an unpaired electron predominantly localized on the iron center.
- This work provides fundamental insights into bonding in first-row transition metal heterobimetallics.
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