The crystal structure at 293 K of the new pyrrolidinium chloroantimonate (V) analogue, (C 4 H 8 NH 2 )SbCl 6 ·(C 4 H 8 NH 2 )Cl, has been determined by x-ray diffraction as monoclinic, space group P 2 1 / c , Z = 8. The crystal is built up of isolated SbCl 6 - anions, two types of inequivalent pyrrolidinium cation and isolated Cl - ions. It undergoes five solid-solid phase transitions: at 351/374 K of first-order type (cooling/heating, respectively), at 356 and 152 K second order and at 135/141 and 105/134 K first order, detected by differential scanning calorimetry, dilatometric and dielectric measurements. The ferroelastic domain structure appears between 152 and 135 K. The proton nuclear magnetic resonance second moment and spin-lattice relaxation time of polycrystalline samples were studied over the temperature range 27-410 K. The order-disorder mechanism of the phase transitions at 105 and 374 K connected with the reorientational motion of the pyrrolidinium cations has been confirmed.
No takes yet. Share an insight, caveat, or question.
Bednarska-Bolek et al. (2002) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: