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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Structures and phases transition in hexylenediammonium pentachlorobismuthate (III) [NH
3
(CH
2
)
6
NH
3
]BiCl
5
crystal
Journal of Solid State Chemistry, Volume 200, Year 2013
Notification
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Description
The crystal structure of [NH3(CH2)6NH 3]BiCl5 was determined at: 223 K [P212 121 (Z=4), a=7.788(1), b=13.886(2), c=13.972(2) Å], 308 K [P21/n (Z=8), a=19.972(3), b=7.772(2), c=20.166(3) Å, β=92.32(1)°] and 378 K [Pnma (Z=4), a=13911(2), b=7.834(7), c=14.457(2) Å]. It was consisted of isolated (BiCl52-) n anionic chains composed by distorted octahedra BiCl 63- sharing two corners and +NH 3(CH2)6NH3+ cations placed in the free cavities between anionic chains. In the β phase, there are two crystallographically inequivalent cations and two one-dimensional anionic chains (BiCl52-)n in which BiCl 63- octahedra was doubly tilted and simply tilted. Two structural phase transitions at low and high temperatures α (P2 12121, 223 K)↔β (P21/n, 308 K)↔γ (Pnma, 373 K) are observed and discussed. It was crystallographically showed that both anionic and cationic entities contribute to phase transitions mechanisms. The BiCl63- octahedra were found to posses significant distortions on decreasing temperature and became more distorted in α (223 K) phase. It is argued that these deformations are caused by weak to moderate NH···Cl hydrogen bonding. © 2013 Elsevier Inc.
Authors & Co-Authors
Ouasri, A.
Morocco, Kenitra
Faculty of Science, Ibn Tofail University
Morocco, Fes
Centre Régional Des Métiers de L'education et de la Formation
Jeghnou, H.
Morocco, Kenitra
Faculty of Science, Ibn Tofail University
Rhandour, Ali
Morocco, Kenitra
Faculty of Science, Ibn Tofail University
Roussel, Pascal
France, Villeneuve-d'ascq
Unité de Catalyse et Chimie du Solide Uccs
Statistics
Citations: 27
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1016/j.jssc.2013.01.002
ISSN:
00224596
e-ISSN:
1095726X