Thermochemistry of CCl4 solvation in systems n-alkane-1-alkanol

The heats of solution of CCl4 in the systems n-hexane-1-butanol, n-hexane-1-decanol, n-decane 1-butanol, and n-decane-1-decanol at 25 degreesC were measured calorimetrically. In ail the systems the heats of solution of CCl4 pass through a maximum at a mole fraction of the alcohol of about 0.3. The excess enthalpies of solution of CCl4 are positive. They weakly depend on the size of the alkane molecule but noticeably increase in going from the systems with decanol to those with butanol. The state of CCl4 in the binary solvents was examined in terms of a concept suggested in the literature. Solvation of CCl4 in the individual alcohols was studied taking into account published data. It was found that CCl4 behaves as a proton acceptor, though its donor number is zero.