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Krypton difluoride
ifluorokrypton · difluorokrypton · Krypton difluoride · Krypton(II) difluoride
Identifikatoren & physikalische Daten
| CAS No. | 13773-81-4 |
|---|---|
| Summenformel | F2Kr |
| Durchschnittliche Molmasse | 121,79 g/mol |
| SMILES | F[Kr]F |
| InChIKey | QGOSZQZQVQAYFS-UHFFFAOYSA-N |
| PubChem CID | 83721 |
| DTXSID | DTXSID7065623 |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 0 |
|---|---|
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 2 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 3 |
| Formalladung | 0 |
| Komplexität | 2,8 |
| Schmelzpunkt | decomposes at ~25℃ [KIR78] |
| Dichte | (calc) 3.24 |
| Löslichkeit | reacts with H2O |
| Aggregatzustand | colorless tetragonal crystals |
| Farbe | colorless tetragonal crystals, crystalline |
| EPA chemische Informationen | Krypton fluoride (KrF2) (13773-81-4) |
Sicherheit & Vorschriften
| TSCA-Inventar-Status | TSCA listed |
|---|
Anwendungen & Verwendung
Verwenden
As gas filler in special purpose electric bulbs. To initiate and sustain the arc in metal-vapor discharge tubes, such as mercury and sodium vapor lamps. To determine surface areas of fine solids by adsorption techniques.
Herstellung & Synthese
synthetische
Krypton difluoride may be prepared by the reaction of krypton with fluorine in an electric discharge at low pressure and liquid oxygen temperature. Also it may be made by irradiating krypton with ultraviolet rays in a fluorine—argon gas mixture at liquid helium temperature (-196°F). Kr + F2 → KrF2 The product can be stored at -78°C without decomposition.