Thermodynamic studies on infinitely dilute solutions of xylenes and ethyltoluenes in 4-[(4-chlorobenzyl)oxy]-4 '-cyanoazobenzene liquid crystal

Specific retention volumes, activity coefficients at infinite dilution, par tial molar excess enthalpies and entropies, partial molar enthalpies of sol ution for m-, p-xylenes and m-, p-ethyltoluenes in 4-[(4-chlorobenzyl)oxy]- 4-cyanoazobenzene (CBOCA) as solvent were determined using gas-liquid chrom atography. The separation of m-, p-xylenes and m-, p-ethyltoluenes was stud ied on a packed column with 2.5 % CBOCA on Chromosorb W HP 100-120 mesh, in the nematic and smectic phases of this liquid crystal. Comparisons and com ments were made on the resulted thermodynamic values of xylenes and ethylto luenes within the same phase (smectic) and on those of ethyltoluenes in bot h phases (smectic and nematic).