Self-Diffusion Coefficients and Rotational Correlation Times in Polar Liquids. V. Cyclohexane, Cyclohexanone, and Cyclohexanol

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Abstract
Self‐diffusion coefficients and proton and deuteron relaxation times have been measured in cyclohexane (C6H12), cyclohexanone (C6H10O), and cyclohexanol (C6H12O). The results are interpreted with the quasilattice random flight (QLRF) model and a dynamical rotational coherence (DRC) theory, a general formulation of which is given in the present paper. The experiments were carried out to ascertain the effect of adding (1) a large dipole moment and (2) a strong hydrogen bond to the cyclohexane molecule. Molecular reorientation or self‐diffusion are not greatly affected by the addition of dipole moment but become more than an order of magnitude slower in cyclohexanol. The results of DRC and QLRF models are compared with experiment for a wide variety of liquids.