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Updated: Jul 15, 2026
10:51
The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
C-C sigma complexes of rhodium
Simon K Brayshaw1, Emma L Sceats, Jennifer C Green
1Department of Chemistry, University of Bath, Bath, United Kingdom.
Summary
This study describes novel rhodium complexes featuring rare metal-carbon agostic interactions. These complexes exhibit dynamic C-C bond activation via a bismetallacyclobutane intermediate.
Area of Science:
- Organometallic chemistry
- Inorganic chemistry
- Materials science
Background:
- Rhodium complexes are crucial catalysts in various chemical transformations.
- Understanding metal-ligand interactions is key to designing new catalytic systems.
- Agostic interactions, while known, are less common in rhodium chemistry.
Purpose of the Study:
- To synthesize and characterize novel rhodium complexes with specific ligands.
- To investigate the presence and nature of unusual bonding interactions within these complexes.
- To elucidate the mechanism of C-C bond activation in these systems.
Main Methods:
- X-ray crystallography for structural determination.
- Nuclear Magnetic Resonance (NMR) spectroscopy for dynamic studies.
- Density Functional Theory (DFT) and Atoms in Molecules (AIM) calculations for electronic structure analysis.
- Kinetic studies to probe reaction pathways.
Main Results:
- The synthesis of [Rh(Binor-S')(PR3)][BAr(4)(F)] complexes is reported.
- Rare metal-carbon (metal...C-C) agostic interactions were unequivocally confirmed.
- Complexes display fluxional behavior on the NMR timescale, indicating dynamic processes.
- Evidence for rapid and reversible C-C bond activation was observed.
Conclusions:
- The characterized rhodium complexes represent rare examples of metal-carbon agostic interactions.
- The observed C-C activation proceeds through a bismetallacyclobutane intermediate.
- These findings offer new insights into the reactivity and bonding of organometallic complexes.
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