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The First Ammoniates of Alkali Metal Fluorides : Cesium Fluoride Ammonia ( 3 / 4 ) [ Cs 3 F 3 ( NH 3 ) 4 ] and Ammonium Cesium Difluoride [ NH 4
| Content Provider | Semantic Scholar |
|---|---|
| Author | Baer, Sebastian A. Kraus, Florian |
| Copyright Year | 2010 |
| Abstract | Two new compounds containing cesium fluoride have been obtained as side-products from the reactions of Cs2CuF6 and Cs2KDyF6 with liquid ammonia. Cs2CuF6 reacts with the solvent forming a still unknown blue substance and the colorless ammoniate Cs3F3(NH3)4 which crystallizes in the cubic space group I4̄3d (no. 220) with a = 10.273(1) Å and V = 1084.3(2) Å3 at 123 K with Z = 4. Its crystal structure is isopointal to Y3Au3Sb4 and shows an infinite three-dimensional network made up through N–H· · ·F hydrogen bonds. Ammonium cesium difluoride NH4CsF2 crystallizes in the orthorhombic space group Pnma (no. 62) with a = 7.1791(1), b = 4.1244(1), c = 13.6417(2) Å and V = 403.92(1) Å3 at 123 K with Z = 4. The crystal structure displays two-dimensional infinite layers of the composition ∞[(NH4F2) −] with embedded Cs+ ions. Analogous to the structure of the compound Cs3F3(NH3)4, the structural motif is formed through strong N–H· · ·F hydrogen bonds, which seem to be the guiding force. To the best of our knowledge, the title compounds are the first reported ammoniates of alkali metal fluorides. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.znaturforsch.com/s65b/s65b1177.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Alkalies Ammonia Ammonium Chloride Crystal structure Cubic function Embedded system Embedding Fluorides Hydrogen Ions Metals, Alkali NetHack Sequence motif ammonium lactate anatomical layer cesium fluoride sequestering of metal ion |
| Content Type | Text |
| Resource Type | Article |
