Berylliumdibromid
Einecs 232-115-9 · Beryllium bromide. · beryllium dibromide · Beryllium bromide (bebr2) · beryllium(+2) cation dibromide
Identifikatoren & physikalische Daten
| CAS No. | 7787-46-4 |
|---|---|
| Summenformel | BeBr2 |
| Durchschnittliche Molmasse | 168,82 g/mol |
| Monoisotopische Masse | 166,84886 g/mol |
| SMILES | [Be+2].[Br-].[Br-] |
| InChIKey | PBKYCFJFZMEFRS-UHFFFAOYSA-L |
| PubChem CID | 522686 |
| Lokaler Name | Berylliumdibromid |
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 | 506-509°also reported as 488° |
| Siedepunkt | bp 520° |
| Dichte | 3.465 |
| Löslichkeit | very soluble in H2Osoluble in ethanol, pyrvery soluble H2O [MER06] |
| Aggregatzustand | orthorhombic crystals |
| Farbe | orthorhombic crystals, crystallinehygroscopic |
| Spezifische Wärmekapazität | Cp(crystal): 0.41 J/(g·K), at 25℃ |
| EPA chemische Informationen | Beryllium bromide (BeBr2) (7787-46-4) |
Sicherheit & Vorschriften
| TSCA-Inventar-Status | TSCA listed |
|---|---|
| UN-Transportnummer | 1566 |
| Gefahrenklasse | 6.1(b) |
| Verpackungsgruppe | III |
Anwendungen & Verwendung
Verwenden
Beryllium fluoride is used in biochemistry, particularly protein crystallography, since it binds in some of the same ways as phosphate does in human tissues. ADP and beryllium fluoride together tend to bind to ATP sites and inhibit protein action, making
Herstellung & Synthese
synthetische
Beryllium bromide has the formula BeBr2. It is very hygroscopic and is soluble in water. It has the molecular weight of 168.821 g/mol. The structure has not been documented. Beryllium bromide can be prepared by reacting Be metal with elemental bromine at temperatures of 500°C–700°C: Be＋Br2→BeBr2 Beryllium bromide is also formed when beryllium oxide with HBr in aqueous solution or hydrogen bromide in the gas phase: BeO＋2HBr→BeBr2＋H2O This bromide compound was first prepared by Wohler (1828) by the action of bromine vapor on the metal and also upon a mixture of carbon and beryllium oxide.Berthemot (1831) obtained it in solution by dissolving the oxide in hydrobromic acid. Humpridge (1883) also prepared it by acting on a mixture of the oxide and carbon with dry bromine. The anhydrous bromide is always obtained by sublimation as colorless white crystals.