ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 10, Number 1
JKCSEZ 10(1)
February 20, 1966 

The systems of bromobenzene with chlorine and iodine monobromide in carbon tetrachloride have been investigated at 25°by means of ultraviolet spectrophotometric measurements. The results indicate the formation of one to one molecular complexes, C6H5Br·Cl2 and C6H5Br·IBr, in solution. The equilibrium constants obtained at 25°for the formation of these two complexes are 0.0485 and 0.183 l·mole-1, respectively. Comparison of these results with those reported in the literature on other complexes of similar type shows that the relative stabilities of the complexes decrease in the following orders: ICl > IBr > I2 > Br2 > Cl2 Benzene > bromobenzene > chlorobenzene.