Apparent molar volumes and viscosities of l- and meso-tartaric acid in water and of (1R,2S,5R)- and (1S,2R,5S)-menthyl p-toluenesulfinate in l-butanol at 25 degrees C are reported. The differences observed between E-and meso-forms of tartaric acid and between (1R,BS,5R)- and (1S,2R,5S)-forms of menthyl p-toluenesulfinates are interpreted in terms of structural differences arising from different configurations of isomeric compounds. The results support the conclusion that different forms of compounds with more than one asymmetric center show differences in solution behavior.