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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

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Dimethyl-ammonium tetra-chloridoferrate(III) 18-crown-6 clathrate.

Ping Ping Shi¹, Min Min Zhao

¹Ordered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online

|May 19, 2011

Summary

Researchers synthesized a novel supramolecular compound using dimethyl-amine hydrochloride, 18-crown-6, and ferric chloride. This structure features a unique rotator-stator arrangement stabilized by hydrogen bonds.

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Published on: December 29, 2016

Area of Science:

Supramolecular Chemistry
Coordination Chemistry
Crystallography

Background:

Crown ethers like 18-crown-6 are known for their ability to complex cations.
Dimethyl-amine hydrochloride provides a protonated amine source for hydrogen bonding.
Ferric chloride serves as the counterion and influences crystal packing.

Purpose of the Study:

To synthesize and characterize a novel supramolecular compound.
To investigate the self-assembly and structural features of the resulting complex.
To explore the role of hydrogen bonding in stabilizing the supramolecular architecture.

Main Methods:

Chemical synthesis involving the reaction of dimethyl-amine hydrochloride, 18-crown-6, and ferric chloride in ethanol.
Single-crystal X-ray diffraction to determine the molecular and crystal structure.
Analysis of hydrogen bonding interactions (N-H⋯O) and crystallographic symmetry.

Main Results:

The title compound, (C(2)H(8)N)[FeCl(4)]·C(12)H(24)O(6), was successfully synthesized.
An unusual 1:1 supramolecular rotator-stator structure, (CH(3)-NH(2)(+)-CH(3))(18-crown-6), was observed.
Hydrogen bonding between the protonated dimethyl-amine and the crown ether stabilized the structure.
All components were found to lie on a crystallographic mirror plane.

Conclusions:

The study demonstrates the formation of a novel supramolecular complex with a unique rotator-stator arrangement.
Hydrogen bonding plays a crucial role in the self-assembly and stabilization of this supramolecular structure.
The crystallographic analysis reveals specific packing arrangements and symmetry elements influencing the overall structure.