Phosphorus oxybromide
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| Names | |||
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| Other names
Phosphorus oxybromide
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| Identifiers | |||
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3D model (JSmol)
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| ChemSpider | |||
| ECHA InfoCard | 100.029.252 | ||
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PubChem CID
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| Properties | |||
| POBr3 | |||
| Molar mass | 286.69 g/mol | ||
| Density | 2.82 g cm−3 | ||
| Melting point | 56 °C (133 °F; 329 K) | ||
| Boiling point | 192 °C (378 °F; 465 K) | ||
| Hazards | |||
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EU classification (DSD) (outdated)
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 C |
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| R-phrases (outdated) | R14, R34, R37 | ||
| S-phrases (outdated) | S7/8, S26, S36/37/39, S43, S45 | ||
| Related compounds | |||
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Related compounds
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Phosphorus tribromide Thiophosphoryl bromide Phosphoryl fluoride Phosphoryl chloride |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |||
Phosphoryl bromide, also known as phosphorus oxybromide, is an inorganic compound with the formula POBr3. It can be prepared via the slow addition of liquid bromine to phosphorus tribromide at 0 °C, followed by the slow addition of water and vacuum distillation of the resulting slurry.
It is prepared according to the equation: 3 PBr5 + P2O5 → 5 POBr3
Thin plates, faint orange tint, d 2.822. mp 56° (in hot water). bp758 193° (decomposes). Slowly hydrolyzes in water forming H3PO4 and HBr. Soluble in ether, benzene, chloroform, carbon disulfide, concentrated H2SO4. Store in sealed glass ampoules.
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