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Volatile Donor-Functionalized Alkoxy Derivatives of Lutetium and Their Structural Characterization(1)
Reiner Anwander1, Florian C. Munck, Thomas Priermeier
1Institut für Technische Chemie I, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, and Anorganisch-chemisches Institut, Technische Universität München, Lichtenbergstrasse 4, D-85747 Garching, Germany.
Inorganic Chemistry
|July 30, 1997
Summary
New lanthanide alkoxide complexes were synthesized from beta-functionalized alcohols. A unique tetranuclear complex containing oxo and hydroxo units was discovered, featuring a butterfly-shaped core structure.
Area of Science:
- Organometallic Chemistry
- Lanthanide Chemistry
- Coordination Chemistry
Background:
- Lanthanide alkoxides are versatile precursors in materials science and catalysis.
- Synthesis and characterization of homoleptic lanthanide alkoxides are crucial for understanding their reactivity.
- Beta-functionalized alcohols offer unique coordination possibilities due to their pendant functional groups.
Purpose of the Study:
- To synthesize novel homoleptic lanthanide alkoxide complexes using beta-functionalized alcohols.
- To investigate the structural diversity and properties of these complexes, including volatility and solubility.
- To explore the impact of ligand structure and impurities on the resulting lanthanide alkoxide architectures.
Main Methods:
- Reaction of beta-functionalized alcohols with lanthanide tris(bis(trimethylsilyl)amide) precursors.
- Isolation and purification of products via sublimation and n-hexane crystallization.
- Single-crystal X-ray diffraction for detailed structural determination of key complexes.
- Characterization of volatility through sublimation temperature measurements.
Main Results:
- Highly volatile and n-hexane-soluble homoleptic lanthanide alkoxide complexes [Ln(OCR(2)CH(2)do)(3)] were synthesized.
- A dinuclear complex Lu(OCMe(2)CH(2)OMe)(3) was structurally characterized, showing asymmetrical ligand association.
- An unprecedented tetranuclear complex Lu(4)(O)(OH)(OCMe(2)CH(2)OMe)(9) containing oxo and hydroxo units was isolated from water-contaminated alcohol, featuring a butterfly-shaped Lu(4)O(15)-core.
Conclusions:
- Beta-functionalized alcohols are effective ligands for synthesizing volatile homoleptic lanthanide alkoxides.
- The presence of water can lead to the formation of complex polynuclear structures with oxo and hydroxo bridging ligands.
- The discovered tetranuclear complex represents a novel class of lanthanide alkoxides with unique structural features.