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溴化镓

溴化镓(二聚体)
别名 三溴化镓
识别
CAS号 13450-88-9  ☒N
PubChem 83477
ChemSpider 75315
SMILES
 
  • Br[Ga](Br)Br
InChI
 
  • 1/3BrH.Ga/h3*1H;/q;;;+3/p-3
InChIKey SRVXDMYFQIODQI-DFZHHIFOAJ
性质
化学式 GaBr3
摩尔质量 309.435 g/mol g·mol⁻¹
外观 白色固体
密度 3.69 g/cm3
熔点 121.5 °C(395 K)
沸点 278.8 °C(552 K)
溶解性 可溶
危险性
欧盟分类 剧毒 T+腐蚀性 C有害环境物质 N
NFPA 704
0
4
0
 
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

溴化镓 (GaBr3)是一种化合物,也是四种卤化镓英语gallium halides之一。

溴化镓是一种白色固体,会与水反应。[1]固体溴化镓在室温下稳定,主要以二聚体形式存在。[2]

制备

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制备GaBr3的一种方法是在真空下存在液体溴的情况下加热元素镓。[3]在高度放热的反应之后,将混合物静置,然后进行各种纯化步骤。从20世纪初开始,这种方法仍然是制备GaBr3的有用方法。从历史上看,镓是通过在KOH溶液中电解氢氧化物而获得的,但是如今,它是作为铝和锌生产的副产品而获得的。

GaBr3 也可以由 Ga(s) 和 Br(g) 在无水,无氧,有机和无油脂的环境中化合而成。[3][4]反应产物是气体,必须结晶才能形成实验室购买的GaBr3固体:

Ga(s) + 3Br(l) → GaBr3(g)

参考资料

[编辑]
  1. ^ Gallium(III) bromide. Sigma Aldrich Catalogue. Sigma Aldrich Company. (原始内容存档于2019-12-19). 
  2. ^ King, Bruce R. Encyclopedia of Inorganic Chemistry. New York: Wiley. 1994: 1265–1267. ISBN 978-0-471-93620-6. 
  3. ^ 3.0 3.1 Johnson, W. C.; Parsons, J. B. The Preparation of Gallium Tribromide and Gallium Triiodide. The Journal of Physical Chemistry. 1929-01-01, 34 (6): 1210–1214. ISSN 0092-7325. doi:10.1021/j150312a007. 
  4. ^ Downs, A.J. Chemistry of Aluminium Gallium Indium and Thallium. Springer Science & Business Media. 199: 133. 
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溴化镓
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