The Gibbs @E02108@ (\(\Delta ^{\ddagger}G\)) in the limiting case where \(\Delta G^{\,\unicode{x26ac}} = 0\), i.e. when the effect of thermodynamic driving force is eliminated. According to the @M03702@, the intrinsic barrier is related to the @R05292@, \(\lambda \), of the reaction by the equation: \[\Delta ^{\ddagger}G = \frac{\lambda }{4}\]