Arsenic tribromide
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| Arsenic tribromide | |
|---|---|
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| Other names | Arsenic(III) bromide |
| Identifiers | |
| CAS number | [7784-33-0] |
| Properties | |
| Molecular formula | AsBr3 |
| Molar mass | 314.634 g/mol |
| Appearance | white to pale yellow crystalline solid |
| Density | 3.40 |
| Melting point |
31 °C |
| Boiling point |
221 °C |
| Solubility in water | decompose |
| Related compounds | |
| Related compounds | Phosphorus tribromide arsenic trichloride |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Arsenic tribromide is the chemical compound with the formula AsBr3. This pyramidal molecule is the only known binary arsenic bromide. It forms by the direct reaction of bromine and arsenic. AsBr3 is noteworthy for its very high refractive index of approximately 2.3. It also has a very high diamagnetic susceptibility.[1]
[edit] Bromides of arsenic
AsBr5 is not known, although the corresponding phosphorus compound PBr5 is known. AsBr3 is the parent for a series of hypervalent anionic bromoarsenates including [As2Br8]2−, [As2Br9]3−, and [As3Br12]3−.[2]
Organoarsenic bromides, (CH3)2AsBr and (CH3)AsBr2 are formed efficiently by the copper-catalyzed reaction of methyl bromide with hot arsenic metal. This synthesis is similar to the direct process used for the synthesis of methyl chlorosilanes.
[edit] References
- ^ CRC handbook of Chemistry and Physics, CRC Press
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
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