Complex Formation between Carbon Tetrachloride and Aromatic Hydrocarbons

Abstract

The spectroscopically determined equilibrium constant for complex formation between carbon tetrachloride and hexamethylbenzene is 0.64±0.12 mole/liter at 25°C. This value is about six times as large as the corresponding constant for the carbon tetrachloride—mesitylene complex; therefore, carbon tetrachloride is acting as the electron acceptor. The solubility of solid hexamethylbenzene in carbon tetrachloride at 25°C is 7.7 mole %. When referred to pure subcooled hexamethylbenzene, the activity coefficient of the solute is less than unity giving the unusual result that this solution of nonpolar components exhibits negative deviations from Raoult's law.