DIFFUSION OF CYCLOHEXANE AND CYCLOPENTANE DERIVATIVES IN SOME POLAR AND NONPOLAR-SOLVENTS - EFFECT OF INTERMOLECULAR AND INTRAMOLECULAR HYDROGEN-BONDING INTERACTIONS

Using the Taylor dispersion method, limiting interdiffusion coefficien ts of cyclohexane, cyclohexanone and cyclohexanol have been measured i n methanol, ethanol, hexan-1-ol, acetonitrile and decane at 298.2 K. T he decrease in the diffusion coefficients from cyclohexane to cyclohex anol is large in methanol, ethanol and hexan-1-ol, intermediate in ace tonitrile and small in decane. The measurements have also been made fo r cyclohexanediols, cyclohexanetriols, cyclopentanol and cyclopentandi ols in ethanol at 298.2 K. Not only the number of hydroxy groups, but also the configuration and conformation of the solutes are important i n determining the diffusion coefficients.