Boron triiodide
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| Names | |||
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| IUPAC name
triiodoborane
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| Identifiers | |||
3D model (JSmol)
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| ChemSpider | |||
| ECHA InfoCard | 100.033.492 | ||
PubChem CID
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| RTECS number |
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CompTox Dashboard (EPA)
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| Properties | |||
| BI3 | |||
| Molar mass | 391.52 g/mol | ||
| Appearance | crystalline solid | ||
| Density | 3.35 g/cm3 (50 °C) | ||
| Melting point | 49.9 °C (121.8 °F; 323.0 K) | ||
| Boiling point | 210 °C (410 °F; 483 K) | ||
| soluble,hydrolysis | |||
| Solubility | soluble in CCl4, CS2, benzene, chloroform | ||
| 0D | |||
| Structure | |||
| trigonal | |||
| Thermochemistry | |||
Heat capacity (C)
|
71 J/mol K | ||
Std molar
entropy (S⦵298) |
200 J/mol K | ||
Std enthalpy of
formation (ΔfH⦵298) |
-37.2 kJ/mol | ||
| Hazards | |||
| NFPA 704 (fire diamond) | |||
| Flash point | −18 °C (0 °F; 255 K) | ||
| Safety data sheet (SDS) | Sigma-Aldrich | ||
| Related compounds | |||
Related compounds
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Boron trifluoride Boron trichloride Boron tribromide | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Boron triiodide is a chemical compound of boron and iodine with chemical formula BI3. It has a trigonal planar molecular geometry. It is a crystalline solid, which reacts vigorously with water to form boric acid.[2] Its dielectric constant is 5.38 and its heat of vaporization is 40.5 kJ/mol. At extremely high pressures, BI3 becomes metallic at ~23 GPa and is a superconductor above ~27 GPa. [3]
Preparation
Boron triiodide can be prepared by the reaction of boron with iodine at 209.5 °C or 409.1 °F.[citation needed] It can also be prepared by this other method: (this reaction requires high temperature).
References
- ^ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
- ^ http://www.sciencemadness.org/talk/files.php?pid=110072&aid=4171
- ^ http://journals.aps.org/prb/abstract/10.1103/PhysRevB.82.094506