Structural characterization and spectroscopic properties of imidazolium chlorobismuthate(III): [C3H5N2]6[Bi4Cl18]

✍ Scribed by A. Piecha; R. Jakubas; A. Pietraszko; J. Baran

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 611 KB
• Volume: 844-845
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2007.03.052

✦ Synopsis

The crystal structure of [C 3 H 5 N 2 ] 6 Bi 4 Cl 18 has been determined at 293 K by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group, C2/m. The structure is composed of the discrete Bi 4 Cl 18 6À anions and three kinds of the imidazolium cations. The cations appeared to be disordered. The infrared spectra of [C 3 H 5 N 2 ] 6 Bi 4 Cl 18 were measured in the region of the internal vibration of the imidazolium cations (4000-400 cm À1 ) between 11 and 300 K. The temperature changes of wavenumbers of the d(ring), d(C-H) and x(C-H) modes in the vicinity of the 195 and 221 K clearly indicate the contribution of the imidazolium cations motion to the phase transition mechanism taking place in the [C 3 H 5 N 2 ] 6 Bi 4 Cl 18 crystal.