溴化镍

溴化镍
IUPAC名
Nickel(II) bromide
识别
CAS号 13462-88-9  checkY
PubChem 278492
性质
化学式 NiBr2
摩尔质量 218.53 g/mol g·mol⁻¹
外观 黄色固体(无水)
绿色晶体(六水)[1]
氣味 无臭
密度 5.098 g/cm3
熔点 963 °C(1,236 K)(升华)
溶解性 122 g/100ml (10 °C)
134 g/100ml (25 °C)
溶解性 可溶于乙醇
危险性
主要危害 Irritant, corrosive
NFPA 704
0
1
0
 
闪点 不可燃
相关物质
其他阴离子 氟化镍
氯化镍
碘化镍
其他阳离子 溴化钴
溴化铜
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

溴化镍是一种无机化合物化学式为NiBr2,易溶于水。

制备

溴化镍的无水物可由单质在室温下的乙醚中反应得到:[1]

Ni + Br2 → NiBr2

利用氢溴酸氢氧化镍碳酸镍反应,蒸發结晶,可以得到溴化镍的水合物:

2 HBr + Ni(OH)2 → NiBr2 + 2H2O
2 HBr + NiCO3 → NiBr2 + H2O + CO2

1,2-二溴乙烷和30%的氯化镍水溶液反应,可以制备溴化镍。这一反应避免了使用具有强腐蚀性的氢溴酸。反应时1,2-二溴乙烷过量至3倍摩尔比,以四丁基溴化铵相转移催化剂,不额外加溶剂:[2]

NiCl2 + CH2BrCH2Br → NiBr2 + CH2ClCH2Cl

用途

溴化镍可以和α-二亚胺形成配合物,用于催化乙烯聚合。[3]

参考文献

  1. ^ 1.0 1.1 无机化学丛书. 第九卷. 锰分族 铁系 铂系. 科学出版社. pp 357. 表3.9 卤化镍; pp 358. 溴化镍(II)
  2. ^ 张敬畅 等. 溴化镍制备方法的改进. 北京化工大学学报, 1998. 25(2): 64-68
  3. ^ 义建军, 许学翔, 陈伟 等. 镍配合物[N,N]NiBr2的合成及其催化乙烯齐聚研究. 催化学报, 2002. 23(1): 69-71

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