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Heterobimetallic catechol-phosphine complexes with palladium and a group-13 element: structural flexibility and
1Institut für Anorganische Chemie, University of Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany. gudat@iac.uni-stuttgart.de.
Dalton Transactions (Cambridge, England : 2003)
|May 8, 2014
Summary
Group-13 metal complexes with palladium form stable di- and trinuclear structures. Indium and gallium are ideal for these multinuclear assemblies, with complex dynamic processes observed in indium compounds.
Area of Science:
- Coordination Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Group-13 metal acetylacetonates and alkoxides are versatile precursors.
- Palladium complexes with catechol phosphine ligands offer unique coordination modes.
- Heterometallic complexes can exhibit diverse structural motifs and properties.
Purpose of the Study:
- To synthesize novel heterometallic di- and trinuclear complexes of Group-13 metals and palladium.
- To investigate the structural diversity and stability of these multinuclear assemblies.
- To elucidate the dynamic behavior and isomerization mechanisms in indium-containing complexes.
Main Methods:
- Synthesis of heterometallic complexes using Group-13 metal precursors and palladium-catechol phosphine systems.
- Characterization by X-ray crystallography and solution Nuclear Magnetic Resonance (NMR) spectroscopy.
- Dynamic NMR studies to probe ligand exchange and isomerization processes.
Main Results:
- Formation of dinuclear M(catphos)2Pd and trinuclear M{(catphos)2Pd}2 motifs, where M = Al, Ga, In.
- Gallium and indium demonstrated suitability for stabilizing dinuclear and trinuclear assemblies, respectively.
- Dynamic NMR revealed complex isomerization pathways involving proton transfer in indium complexes.
Conclusions:
- The study successfully synthesized and characterized novel heterometallic complexes.
- Structural diversity and flexibility of Group-13 coordination environments influence multinuclear complex stability.
- Indium is particularly effective for stabilizing trinuclear assemblies, exhibiting intricate dynamic isomerization behavior.
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