What is it about?
The compression behavior of [Rb(18-crown-6)][SbCl6] crystal under high pressure in GPa range was investigated in a diamond anvil cell (DAC). The nonlinear relationship between unit-cell parameters under high pressure is attributed to the influence of reduced intermolecular H⋯Cl contacts under pressure. For the Rb atom to penetrate into the center of the crown ether cavity in [Rb(18-crown-6)][SbCl6], it is necessary to apply a pressure of about 2.5 GPa to disrupt the balance of atomic forces in the crystal.
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Photo by Viktor Mindt on Unsplash
Why is it important?
This sample serves as a compression model demonstrating the influence of both attractive and repulsive forces on the change in unit-cell parameters under pressure. Of key interest is the tuning of crystal properties under high pressure.
Perspectives
This work is not only a continuation of our series of works devoted to the structure of crown ether complexes, but also a fresh look at the problems of structural chemistry of alkali metal complexes with crown ethers from a different angle.
Eduard Rusanov
Department of Chemistry and Applied Biosciences, ETH Zürich
Read the Original
This page is a summary of: Attractive and repulsive forces in a crystal of [Rb(18-crown-6)][SbCl6] under high pressure, Acta Crystallographica Section B Structural Science Crystal Engineering and Materials, March 2024, International Union of Crystallography,
DOI: 10.1107/s2052520624001586.
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