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Inne
Crystal structure and phase transitions in dipropylammonium hexachloroantimonate(V): [N(C3H7)2H2][SbCl6].
Autorzy
Rok wydania
2006
Czasopismo
Journal of Molecular Structure
Numer woluminu
792-793
Strony
151-156
DOI
10.1016/j.molstruc.2005.10.058
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The crystal structure of dipropylammonium hexachloroantimonate(V), [N(C3H7)2H2][SbCl6] (DPACA) has been determined by means of X-ray diffraction at 290 K. The compound crystallizes in the monoclinic space group: P21/n. The crystal undergoes three structural phase transitions: two first-order type at 388/376 K (heating-cooling) from phase (I) to (II) and at 157/144 K from phase (III) to (IV), and one second-order type at 210 K from phase (II) to (III). The dielectric relaxation process has been found to appear in a kilohertz frequency region over the phases (II) and (III) with the activation energy ca. 28 kJ mol−1. A polydispersive character of the dielectric dispersion indicates a presence of complex molecular motions of dipolar groups in the crystal. The mechanism of the phase transitions in DPACA is proposed.
Słowa kluczowe
Chloroantimonates(V), Phase transitions, DSC, Dielectric relaxation
Adres publiczny
https://doi.org/10.1016/j.molstruc.2005.10.058
Strona internetowa wydawcy
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