Abstract
On the basis of the liquid state being quasi‐crystalline, a modification of the transition state theory leads to a simple equation for the temperature dependence of the fluidity, which involves a characteristic frequency of molecular vibration. The parameters of the fluidity equation are shown to have a linear correlation for certain liquids. The quasi‐crystalline picture is then extended to a simple collision theory of uni‐ and bimolecular reactions in solution, and it is shown that the known correlation of the parameters of the Arrhenius equation arises from the fluidity correlation.

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