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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 2, Number 3
BKCSDE 2(3)
March 20, 1981 

 
Title
Kinetics of the Bromine-Exchange Reaction of Gallium Bromide with n-Propyl Bromide in 1,2,4-Trichlorobenzene and in Nitrobenzene
Author
Oh Cheun Kwun, Young Cheul Kim, Sang Up Choi
Keywords
Abstract
The rate of the bromine-exchange reaction between gallium bromide and n-propyl bromide in 1,2,4-trichlorobenzene and in nitrobenzene was measured at 19, 25 and 40 ℃, using n-propyl 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-propyl bromide. The third-order rate constant determined at 19℃ is 2.9 × 10-2 l2· mole-2·sec-1 in 1,2,4-trichlorobenzene and 4.5 × 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. Reaction mechanism for the bromine exchange of n-propyl bromide seemed to be similar to those observed in earlier studies with other alkyl bromides.
Page
86 - 89
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