Diffusion of cyclohexane and cyclopentane derivatives in some polar and non-polar solvents. Effect of intermolecular and intramolecular hydrogen-bonding interactions

Abstract

Using the Taylor dispersion method, limiting interdiffusion coefficients of cyclohexane, cyclohexanone and cyclohexanol have been measured in methanol, ethanol, hexan-1-ol, acetonitrile and decane at 298.2 K. The decrease in the diffusion coefficients from cyclohexane to cyclohexanol is large in methanol, ethanol and hexan-1-ol, intermediate in acetonitrile and small in decane. The measurements have also been made for cyclohexanediols, cyclohexanetriols, cyclopentanol and cyclopentandiols in ethanol at 298.2 K. Not only the number of hydroxy groups, but also the configuration and conformation of the solutes are important in determining the diffusion coefficients.