Dynamical orientation correlations in solution

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Abstract
A many particle coupled translation–rotation diffusion model is analyzed in regard to single particle and collective orientational correlation functions. This model contains a hydrodynamic mechanism which gives rise to dynamical orientation correlations in solution. An approximate expression for the dynamical correlation factor ? is derived in terms of the static pair distribution function. In contradiction to recent arguments, ? does not vanish for this model. We also show that in the case where the pair potential of the solute particles is spherically symmetric, the Debye relaxation law is unmodified by the long‐range hydrodynamic interaction.