The water solubilities (Sw) at various temperatures from 283 K to 308 K and 1-octanol/water partition coefficients (Kow) for four brominated benzenes (1,4-dibromobenzene, 1,2,4-tribromobenzene, 1,2,4,5-tetrabromobenzene, and hexabromobenzene) were measured by either the generator-column or the shakeflask method and the high-performance liquid chromatography method, respectively. These solubility data revealed not only the temperature dependence of Sw, in the form of the enthalpy of solution (Delta;solH), but also the effect of bromine substitution on Sw and Delta;solH. To estimate the activity coefficients (γw) of the brominated benzenes in water from the present Sw data, enthalpies of fusion and melting points for those compounds were measured with a differential scanning calorimeter. Henry's Law constants (Hw) of the brominated benzenes were derived assuming that the obtained γw represented the infinite dilution activity coefficients (γw∞). Some physicochemical characteristics of brominated benzenes were also suggested by comparing the data in this study with that of chlorinated benzenes in the past studies.
ASJC Scopus subject areas
- Chemical Engineering(all)