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Chemically Triggered Assembly of Chiral Triangular Metallomacrocycles.

Habereder¹, Warchhold, Nöth

¹Institut für Anorganische Chemie der Universität, Butenandtstrasse 5-13, D-81377 München (Germany).

Angewandte Chemie (International Ed. in English)

|November 11, 1999

Summary

Chiral half-sandwich complexes self-assemble into triangular metallomacrocycles with perfect stereocontrol. This assembly-disassembly process is reversible, triggered by acid or base addition.

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Area of Science:

Supramolecular Chemistry
Organometallic Chemistry

Background:

Chiral half-sandwich complexes are building blocks for complex structures.
Metallomacrocycles offer unique properties for various applications.

Purpose of the Study:

To investigate the self-assembly of chiral, half-sandwich complexes.
To achieve stereocontrolled formation of triangular metallomacrocycles.
To explore the triggered assembly-disassembly of these macrocycles.

Main Methods:

Utilizing chiral half-sandwich complexes as precursors.
Employing self-assembly techniques.
Investigating acid- and base-induced triggers for assembly-disassembly.

Main Results:

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Formation of triangular metallomacrocycles with complete stereocontrol.

Quantitative yields achieved during the self-assembly process.

Demonstrated reversible assembly-disassembly triggered by pH changes.

Conclusions:

Chiral half-sandwich complexes are effective for constructing stereodefined metallomacrocycles.
The self-assembly process is highly efficient and controllable.
pH-triggered modulation offers a pathway for dynamic supramolecular systems.