Phosphoryl bromide
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| Names | |||
|---|---|---|---|
| Other names
Phosphorus oxybromide | |||
| Identifiers | |||
| 7789-59-5 | |||
| 3D model (Jmol) | Interactive image | ||
| ChemSpider | 23015 | ||
| ECHA InfoCard | 100.029.252 | ||
| PubChem | 24613 | ||
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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 | |||
| EU classification (DSD) |
 C | ||
| R-phrases | R14, R34, R37 | ||
| S-phrases | S7/8, S26, S36/37/39, S43, S45 | ||
| Related compounds | |||
| Related compounds |
Phosphorus tribromide Thiophosphoryl bromide Phosphoryl fluoride Phosphoryl chloride | ||
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
| 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[1][2]
Properties
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.
References
- ↑ Hönigschmid, Hirschbold-Wittner, Z. Anorg. Allg. Chem. 243, 355 (1940)
- ↑ Johnson, Nunn, J. Am. Chem. Soc. 63, 141 (1941); Booth, Seegmiller, Inorg. Synth. 2, 151 (1946)
- ↑ Jacob, E. Jean, Donald D. Danielson, and Svein Samdal. "An electron diffraction determination of the molecular structures of phosphoryl bromide and thiophosphoryl bromide." Journal of Molecular Structure 62 (1980): 143-155.
- ↑ Bell, I. S., P. A. Hamilton, and P. B. Davies. "Infrared Diode–Laser Spectroscopy of Phosphoryl Bromide (BrPO)." Journal of molecular spectroscopy 195.2 (1999): 340-344.
- ↑ Okuda, Tsutomu, et al. "Structural study of phosphoryl bromide by means of nuclear quadrupole resonance." Inorganic Chemistry 14.5 (1975): 1207-1209.
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