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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 6, Number 1
February 20, 1962 

Interaction of Gallium Bromide with Hydrogen Bromide and Methyl Bromide in Nitrobenzene and in 1,2,4-Trichlorobenzene

니트로 벤젠 용액 및 1,2,4-트리클로로 벤젠 용액내에서의 브롬화갤륨과 브롬화수소 또는 브롬화 메칠과의 상호작용
Sang Up Choi

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 GaBr3·CH3Br 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: GaBr3·RBr ↔ GaBr3 + RBr GaBr3·RBr ↔ 1/2 Ga2Br6 + RBr where R denotes either hydrogen atom or methyl group.
77 - 83
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