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- Title
New Ternary Hafniumhalides: Cs[Hf<sub>2</sub>Br<sub>9</sub>] and Rb[Hf<sub>2</sub>Br<sub>9</sub>].
- Authors
Jablonski, Jonas; Köckerling, Martin
- Abstract
The syntheses and crystal structures of two new ternary hafnium compounds, Cs[Hf2Br9] ( 1) and Rb[Hf2Br9] ( 2), are described. Both compounds are obtained in high yield from the chemical reaction of HfBr4 and CsBr or RbBr, respectively, in the presence of a small amount of elemental Al at 450 °C in sealed silica tubes. They crystallize isostructurally in the monoclinic space group P2/ n. The lattice parameters are a = 9.946(1) ( 1) and 9.9388(4) Å ( 2), b = 6.6580(9) ( 1) and 6.6695(3) Å ( 2), c = 12.930(2) ( 1) and 12.8435(6) Å ( 2), and β = 112.479(6)° ( 1) and 112.726(2)° ( 2). The crystals of the two compounds contain dinuclear tri-μ-bromido-hexabromido-dihafnate(-) complex anions, [Hf2Br9]-, besides the alkali metal cations. The complex anions can be described as face-sharing bioctahedral units.
- Subjects
TRANSITION metal compounds synthesis; HAFNIUM compounds; CRYSTAL structure; CHEMICAL reactions; MONOCLINIC crystal system
- Publication
Zeitschrift für Anorganische und Allgemeine Chemie, 2015, Vol 641, Issue 14, p2392
- ISSN
0044-2313
- Publication type
Article
- DOI
10.1002/zaac.201500178