Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Interaction of Gallium Bromide with Hydrogen Bromide and Methyl Bromide in Nitrobenzene and in 1,2,4-Trichlorobenzene

니트로 벤젠 溶液 및 1,2,4-트리클로로 벤젠 溶液內에서의 브롬化갤륨과 브롬化水素 또는 브롬化 메칠과의 相互作用

  • 최상업 (建國大學校 理工大學 化學科)
  • Published : 19620200
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Abstract

The solubilities of hydrogen bromide and methyl bromide in nitrobenzene and in 1,2,4-trichlorobenzene have been measured in the presence and absence of gallium bromide. When gallium bromide does not exist in the system, the solubilities of HBr and MeBr in nitrobenzene are greater than in 1,2,4-trichlorobenzene, indicating the greater basicity of nitrobenzene than 1,2,4-trichlorobenzene. When there exists gallium bromide in the system, the addition compounds, GaBr3·HBr and GaBr3·CH3Br, have been found to exist in solution. The addition compound of GaBr3·HBr is stable in nitrobenzene but unstable in 1,2,4-trichlorobenzene. On the other hand the addition compound of $GaBr_3{\cdot}CH_3Br$ is unstable in both solvents. All of these unstable addition compounds dissociate into components to large extents according to one of the following equilibria or both: $$GaBr_3{\cdot}RBr{\leftrightarrows}GaBr_3+RBr\;GaBr_3{\cdot}RBr{\leftrightarrows}1}2\;Ga_2Br_6+RBr$.$ where R denotes either hydrogen atom or methyl group.

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References

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