ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 9, Number 4
JKCSEZ 9(4)
August 20, 1965 

The results of ultraviolet spectrophotometric investigations on the system of chlorobenzene with iodine, chlorine and iodine monobromide in carbon tetrachloride at 25° indicate the formation of one to one molecular complexes, C6H5Cl·I2, C6H5Cl·Cl2 and C6H5Cl·IBr. The equilibrium constants obtained at 25° for the complex formations are 0.106, 0.0400 and 0.109 lmole-1, respectively. These results combined with those reported in the literature reveal the following order as the relative stabilities of complexes with aromatics and with halogens or interhalogens, respectively. ICl > IBr > I2 > Br2 > Cl2. Benzene > Chlorobenzene.