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Author Spotlight: A Rapid, Microwave-Assisted Hydrothermal Synthesis Of Nickel Hydroxide Nanosheets
Published on: August 18, 2023
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Crystal structure of [Ni(OH2)6]Cl2·(18-crown-6)2·2H2O.
Jacob P Brannon1, Kevin Liang1, S Chantal E Stieber1
1Department of Chemistry & Biochemistry California State Polytechnic University, Pomona 3801 W Temple Ave Pomona CA 91768 USA.
Acta Crystallographica. Section E, Crystallographic Communications
|December 23, 2024
Summary
The crystal structure of hexa-aqua-nickel(II) dichloride and 18-crown-6 was determined. This study reveals a unique sandwich-like arrangement influencing nickel
Area of Science:
- Crystal structure analysis
- Coordination chemistry
- Supramolecular chemistry
Background:
- Nickel(II) complexes with crown ethers are of interest for their structural diversity.
- Understanding the role of counter-ions and solvent molecules in crystal packing is crucial.
Purpose of the Study:
- To determine the crystal structure of hexa-aqua-nickel(II) dichloride-18-crown-6 complex.
- To investigate the supramolecular interactions within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction at 105 K.
- Analysis of bond angles and hydrogen bonding networks.
Main Results:
- The crystal structure of [Ni(H2O)6]Cl2·2(18-crown-6)·2H2O was solved.
- The [Ni(H2O)6]2+ cation exhibits near-ideal octahedral geometry.
- A sandwich-like structure is formed with two 18-crown-6 molecules flanking the nickel complex.
- Extensive hydrogen bonding networks involving water ligands, crown ethers, chloride anions, and solvent water were observed.
Conclusions:
- The symmetric hydrogen-bonding network, facilitated by chloride anions, likely contributes to the idealized octahedral geometry of the nickel complex.
- The study highlights the interplay between coordination geometry and supramolecular assembly in crystalline materials.
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