Extension to include XR

In the treatment so far we have assumed a linear free energy profile along the x-coordinate in Fig. 11. For the two activated cases, Cases I and III, we now extend the treatment to include a distance xR that describes, as shown in Fig. 14, a parabolic minimum for the reactants as given by (27). The 

For the particular case of a parabola, using the relation (31), we find that 

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