Ag3Bi14Br21: Ein Subbromid mit Bi 24+-Hanteln und Bi95+-Polyedern - Synthese, Kristallstruktur und chemische Bindung
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Contributors
Abstract
Black crystals of Ag3Bi14Br21 = (Bi 95+)[Ag3Bi3Br15 3-]-(Bi2Br62-), the first argentiferous bismuth subhalide, were obtained from a stoichiometric melt of Ag, Bi, and BiBr3. The compound crystallizes in the monoclinic space group P21/m with lattice parameters a = 1277.78(5) pm, b = 1466.87(6) pm, c = 1342.62(5) pm, and β = 108.47(1)° at 110(5) K. In contrast to all other bismuth subhalides that contain an electron-rich transition metal, the silver atoms are not bonded to bismuth atoms. Instead they are integrated into the anionic bromometallate network, which consists of [MBr6]- octahedra (M = Ag, Bi) that share edges and vertices. These corrugated ∞2[Ag3Bi3Br15] 3- sheets alternate with tessellated layers formed by Bi 95+ polycations and hitherto unknown (BiII 2Br6)2- groups. The latter anions contain Bi24+ dumbbells (299 pm) and can be represented by the structured formula [Br2BiII(μBr)2Bi IIBr2]2-. The multi-center bonding within the Bi95+ cluster and the bent single-bond in the Bi 2 dumbbell can be visualized using the electron localization indicator (ELI-D).
Translated title of the contribution | Ag3Bi14Br21 A subbromide with Bi 24+- dumbbells and Bi95+ polyhedra - Synthesis, crystal structure and chemical bonding |
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Details
Original language | German |
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Pages (from-to) | 2873-2879 |
Number of pages | 7 |
Journal | Zeitschrift fur Anorganische und Allgemeine Chemie |
Volume | 634 |
Issue number | 15 |
Publication status | Published - Dec 2008 |
Peer-reviewed | Yes |
External IDs
ORCID | /0000-0002-2391-6025/work/159171939 |
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Keywords
ASJC Scopus subject areas
Keywords
- Bismuth, Cluster, Electron localization indicator, Low-valent compounds, Silver