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Propane-1,3-diaminium bis-(tetra-fluoro-borate)-18-crown-6 (1/2).

¹Ordered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online

|February 21, 2012

Summary

This study details the crystal structure of a supramolecular complex formed by propane-1,3-diammonium cations and crown ether molecules. Hydrogen bonding interactions dictate the self-assembly of these unique molecular architectures.

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Published on: February 12, 2021

Area of Science:

Crystal Engineering
Supramolecular Chemistry
Hydrogen Bonding

Background:

Propane-1,3-diammonium cations are versatile building blocks in supramolecular chemistry.
Crown ethers are known for their ability to form complexes with cations.
Understanding non-covalent interactions is crucial for designing novel molecular assemblies.

Purpose of the Study:

To elucidate the crystal structure of a novel supramolecular complex involving propane-1,3-diammonium and a crown ether.
To investigate the role of hydrogen bonding in the self-assembly of the complex.
To characterize the interactions between the supramolecular host and the counteranions.

Main Methods:

Single-crystal X-ray diffraction analysis was employed to determine the molecular and crystal structure.
Hydrogen bonding networks were analyzed using crystallographic data.
Intermolecular interactions were studied through bond length and angle analysis.

Main Results:

The crystal structure reveals a 1:2 supramolecular complex between the propane-1,3-diammonium cation and crown ether molecules.
Strong N-H⋯O hydrogen bonds facilitate the insertion of the diammonium cation into the crown ether rings.
Weak C-H⋯F hydrogen bonds link the supramolecular complexes to the tetrafluoroborate anions, which exhibit positional disorder.

Conclusions:

The study demonstrates the effective use of hydrogen bonding in constructing intricate 1:2 supramolecular complexes.
The findings highlight the interplay between host-guest interactions and anion interactions in crystal engineering.
This work provides insights into the rational design of supramolecular architectures with potential applications in molecular recognition and materials science.