碘化钡

碘化钡[1]
IUPAC名
Barium iodide
识别
CAS号 13718-50-8(无水)  checkY
7787-33-9(二水)  checkY
13477-15-1(六水)  checkY[NIH]
PubChem 83684
ChemSpider 75507
SMILES
 
  • [Ba+2].[I-].[I-]
InChI
 
  • 1/Ba.2HI/h;2*1H/q+2;;/p-2
InChIKey SGUXGJPBTNFBAD-NUQVWONBAS
EINECS 237-276-9
性质
化学式 BaI2 (无水)
BaI2·2H2O (二水)
摩尔质量 391.136 g/mol (无水)
427.167 g/mol (二水) g·mol⁻¹
外观 白色晶体(无水)
无色晶体 (二水)
氣味
密度 5.15 g/cm3 (无水)
4.916 g/cm3 (二水)
熔点 711 °C(984 K)
溶解性 166.7 g/100 mL (0 °C)
221 g/100 mL (20 °C)
246.6 g/100 mL (70 °C)
溶解性 可溶于乙醇丙酮
磁化率 -124.0·10−6 cm3/mol
结构
晶体结构 正交晶系, oP12
空间群 Pnma, No. 62
热力学
ΔfHm298K -602.1 kJ·mol−1
危险性
主要危害 有毒
相关物质
其他阴离子 氟化钡
氯化钡
溴化钡
其他阳离子 碘化铍
碘化镁
碘化钙
碘化锶
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

碘化鋇(英文:Barium iodide)是分子式為BaI2無機化合物,為白色固體。分兩種型態,一種是水合物,另一種是無水物,都是白色的固體,无水物可由含水碘化鋇加熱得到。

制备

碘化钡可以由氢碘酸碳酸钡反应而成:[2]

它也可以由氢氧化钡和还原剂(如亚硫酸)反应而成。[2]

氢化钡碘化铵吡啶中反应,也能获得碘化钡:[3]

结构

无水碘化钡的结构类似氯化铅[4] 和 BaCl2[5]

反应

无水 BaI2 可以由金属钡和1,2-二碘乙烷乙醚里反应而成。[6]

BaI2 会和烷基钾反应,形成有机钡化合物[7]

BaI2 可以被联苯基还原,形成高活性的钡金属。[8]

危险性

类似其它可溶盐,碘化钡有毒。

参考资料

  1. ^ Lide, David R., Handbook of Chemistry and Physics 87, Boca Raton, FL: CRC Press: 4–44, 1998, ISBN 0-8493-0594-2 
  2. ^ 2.0 2.1 R. Abegg, F. Auerbach: Handbuch der anorganischen Chemie. Bd. 2, Verlag S. Hirzel, 1908. S. 256ff. (Volltext).
  3. ^ Baudler, Marianne. Handbuch der präparativen anorganischen Chemie Bd. 2. / Unter Mitarb. von M. Baudler .... Stuttgart. 1978: 923. ISBN 978-3-432-87813-3. OCLC 310719490 (德语). 
  4. ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
  5. ^ Brackett, E. B.; Brackett, T. E.; Sass, R. L.; The Crystal Structures of Barium Chloride, Barium Bromide, and Barium Iodide. J. Phys. Chem., 1963, volume 67, 2132 – 2135
  6. ^ Duval, E.; Zoltobroda, G.; Langlois, Y.; A new preparation of BaI2: application to (Z)-enol ether synthesis. Tetrahedron Letters, 2000, 41, 337-339
  7. ^ Walter, M. D.; Wolmershauser, G.; Sitzmann, H.; Calcium, Strontium, Barium, and Ytterbium Complexes with Cyclooctatetraenyl or Cyclononatetraenyl Ligands. J. Am. Chem. Soc., 2005, 127 (49), 17494 – 17503.
  8. ^ Yanagisawa, A.; Habaue, S.; Yasue, K.; Yamamoto, H.; Allylbarium Reagents: Unprecedented Regio- and Stereoselective Allylation Reactions of Carbonyl Compounds. J. Am. Chem. Soc.1994, 116,6130-6141

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