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Spontaneous resolution in a halogen bonded supramolecular architecture
Hannes Neukirch1, Emanuela Guido, Rosalba Liantonio
1NFMLab-Department of Chemistry, Materials and Chemical Engineering G. Natta, Polytechnic of Milan, Via L. Mancinelli 7, 20131, Milan, Italy.
Chemical Communications (Cambridge, England)
|March 17, 2005
Summary
This study demonstrates how halogen bonding drives the self-assembly of specific molecules into a chiral co-crystal. The unique arrangement of fluorinated chains within this crystal structure is highlighted.
Area of Science:
- Supramolecular Chemistry
- Crystal Engineering
- Organic Chemistry
Background:
- Halogen bonding is a key non-covalent interaction driving molecular self-assembly.
- Fluorinated organic compounds offer unique properties for materials science.
- Chiral co-crystals are important for enantioselective synthesis and separation.
Purpose of the Study:
- To investigate the self-assembly of 1,8-diiodoperfluorooctane and N,N,N',N'-tetramethyl-p-phenylenediamine.
- To characterize the resulting co-crystal structure and properties.
- To explore the role of halogen bonding in forming chiral and enantiopure materials.
Main Methods:
- Single-crystal X-ray diffraction to determine the co-crystal structure.
- Spectroscopic methods for characterization.
- Computational modeling to understand interaction energies.
Main Results:
- Formation of a chiral and enantiopure co-crystal driven by halogen bonding.
- Unusual gauche conformation observed in the perfluorinated chains.
- Detailed structural analysis revealing intermolecular interactions.
Conclusions:
- Halogen bonding is an effective strategy for constructing chiral co-crystals.
- The observed gauche arrangement influences crystal packing and properties.
- This work provides insights into the design of functional supramolecular materials.