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Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
Heterobimetallic lantern complexes that couple antiferromagnetically through noncovalent Pt···Pt interactions
Frederick G Baddour1, Stephanie R Fiedler, Matthew P Shores
1Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States.
Inorganic Chemistry
|April 23, 2013
Summary
New platinum-based heterobimetallic lantern complexes were synthesized. These complexes exhibit platinum-metal bonding and form dimers via Pt-Pt interactions, leading to antiferromagnetic coupling in paramagnetic species.
Area of Science:
- Inorganic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Platinum-based heterobimetallic complexes are of interest for their unique bonding and structural properties.
- Lantern complexes offer a versatile scaffold for exploring metal-metal interactions.
Purpose of the Study:
- To synthesize and characterize a series of novel Pt-based heterobimetallic lantern complexes.
- To investigate the formation of Pt-M and Pt-Pt bonding in these complexes.
- To study the magnetic coupling phenomena in the solid state.
Main Methods:
- Facile, single-step synthesis of hydrated and dehydrated heterobimetallic lantern complexes.
- Reaction with 3-nitropyridine to form new complexes.
- Structural characterization of selected compounds.
- Magnetic susceptibility measurements to determine coupling constants.
Main Results:
- Successfully prepared Pt-based heterobimetallic lantern complexes of the form [PtM(SAc)4(OH2)] and [PtM(SAc)4(3-NO2py)] (M = Co, Ni, Zn).
- Observed Pt-M bonding in solution and solid state for Co and Ni complexes.
- Demonstrated dimer formation in the solid state via short Pt···Pt metallophilic interactions for all studied complexes.
- Confirmed antiferromagnetic coupling between 3d metal ions in paramagnetic complexes, with specific J-coupling values reported.
Conclusions:
- The formation of Pt···Pt interactions and subsequent antiferromagnetic coupling is not limited to complexes with paramagnetic 3d metal ions or specific axial ligands.
- These findings expand the scope of heterobimetallic lantern complexes and their potential applications in magnetism and materials science.
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