EFFECTS OF SOLVATION ON PARTITION AND DIMERIZATION OF BENZOIC-ACID INMIXED-SOLVENT SYSTEMS

The partition of benzoic acid between 0.1M perchloric acid solution an d two kinds of mixed solvents has been carried out at 25 degrees C. Th e partition and dimerization constants of benzoic acid have been deter mined in the 1-octanol-benzene and 2-octanone-benzene systems. In both the mixed solvent systems, with increasing content of 1-octanol and 2 -octanone in each mixed solvent, the partition constant of benzoic aci d has been found to increase, and the dimerization constant of benzoic acid in each organic phase to decrease. These phenomena are attributa ble to solvation of monomeric benzoic acid by 1-octanol and 2-octanone molecules in each mixed solvent.