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Published on: March 29, 2019
Bismuth allyloxides
Christina Knispel1, Christian Limberg, Burkhard Ziemer
1Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany.
New bismuth allyloxides are soluble and volatile, but form complex aggregated structures in the solid state. These findings are crucial for understanding bismuth compound behavior in different phases.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Materials Science
Background:
- Bismuth compounds exhibit diverse chemical properties.
- Allyloxides are versatile ligands in organometallic chemistry.
- Understanding aggregation behavior is key for material applications.
Purpose of the Study:
- To synthesize and characterize novel bismuth allyloxides.
- To investigate the solubility, volatility, and aggregation states of these compounds.
- To explore their structural motifs in both solution and solid states.
Main Methods:
- Synthesis via alcoholysis of bismuth tris(tert-butoxide) and salt metathesis reactions.
- Characterization using Nuclear Magnetic Resonance (NMR) spectroscopy.
- Structural analysis through X-ray crystallography and sublimation techniques.
Main Results:
- Successfully synthesized four bismuth allyloxides with varying allyl groups.
- Compounds showed good solubility in organic solvents and were amenable to sublimation.
- NMR spectroscopy indicated no aggregation in solution, contrasting with solid-state structures.
- Crystal structures revealed significant aggregation, forming large rings and chains.
Conclusions:
- Bismuth allyloxides display distinct solution and solid-state behaviors.
- The aggregation in the solid state is a key structural feature.
- These compounds offer potential for applications where controlled aggregation is desired.
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Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...