Kinetics of the Bromine-Exchange Reaction of Gallium Bromide with i-Buthyl Bromide in 1, 2, 4-Trichlorobenzene and in Nitrobenzene

[摘要] The rate of the bromine-exchange reaction between gallium bromide and i-butyl bromide in 1,2,4-trichlorobenzene or nitrobenzene was measured at 19, 25 and 40�?, using i-butyl bromide labelled with Br-82. The results indicated that the exchange reaction was second order with respect to gallium bromide and first order with respect to i-butyl bromide. The third-order rate constant determined at 19�? was 3.28 �? 10-2 l2· mole-2·sec-1 in 1,2,4-trichlorobenzene and 9.25 �? 10-3 l2·mole-2·sec-1 in nitrobenzene. The activation energy, the enthalpy of activation and the entropy of activation for the exchange reaction were also determined.

[学科分类] 化学（综合）