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Published on: August 12, 2019
Non-iron [n]metalloarenophanes
Holger Braunschweig1, Thomas Kupfer
1Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany. h.braunschweig@mail.uni-wuerzburg.de
Accounts of Chemical Research
|December 5, 2009
Summary
This study details the synthesis and reactivity of strained metalloarenophanes, highlighting their potential in catalysis and polymer science. Researchers developed new synthetic routes and explored the unique properties of these metal-containing ring systems.
Area of Science:
- Organometallic Chemistry
- Materials Science
- Synthetic Chemistry
Background:
- Ferrocenophanes have numerous applications, but related metalloarenophanes remain underexplored.
- Recent advancements have significantly progressed the field of metalloarenophane synthesis and application.
Purpose of the Study:
- To present the progress in the synthesis and reactivity of strained metalloarenophanes.
- To focus on metalloarenophanes derived from V, Cr, Mo, and Mn sandwich complexes.
- To explore the applications of these compounds in catalysis and polymer synthesis.
Main Methods:
- Synthesis of 1,1'-dilithiated sandwich complexes as precursors.
- Stoichiometric reactions with element dihalides to form [n]metalloarenophanes (n=1, 2).
- Characterization using X-ray diffraction, NMR, EPR, and UV-Vis spectroscopy.
Main Results:
- Over 25 [n]metalloarenophanes synthesized and characterized, exhibiting varying degrees of ring strain.
- Demonstrated reactivity including oxidative addition and ring-opening polymerization (ROP).
- Successful application in alkyne diboration and azobenzene diboration reactions.
Conclusions:
- Strained metalloarenophanes display unique reactivity driven by the reduction of ring strain.
- These compounds offer potential for developing novel catalysts and polymers with metal centers in the main chain.
- Electronic properties correlate with molecular distortion, providing insights for future design.
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