Attractive and repulsive forces in a crystal of [Rb(18-crown-6)][SbCl₆] under high pressure.

ABSTRACT: The compression behavior of [Rb(18-crown-6)][SbCl₆] crystal under pressure up to 2.16 (3) GPa was investigated in a diamond anvil cell (DAC) using a mixture of pentane-isopentane (1:4) as the pressure-transmitting fluid. The compound crystallizes in trigonal space group R3 and no phase transition was observed in the indicated pressure range. The low value of pressure bulk modulus [9.1 (5) GPa] found in this crystal is a characteristic of soft materials with predominant dispersive and electrostatic interaction forces. The nonlinear relationship between unit-cell parameters under high pressure is attributed to the influence of reduced intermolecular H...Cl contacts under pressure over 0.73 GPa. It also explains the high compression efficiency of [Rb(18-crown-6)][SbCl₆]

SUBMITTER: Rusanov EB 

PROVIDER: S-EPMC10994168 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature