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

[摘要] The rate of the bromine-exchange reaction between gallium bromide and n-butyl bromide in 1,2,4-trichlorobenzene and in nitrobenzene was measured at 19, 25 and 40¡É., using n-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 n-butyl bromide. The third-order rate constant determined at 19¡É. is 1.15¡¿10-4 l2¡¤mole-2¡¤sec-1 in 1,2,4-trichlorobenzene and 4.21¡¿10-4 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）