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1. Mirror Image Transition States

   Linked via "minimum energy path (MEP)"

   Theoretical Underpinnings and Symmetry Constraints
   The existence of a mirror image transition state implies that the minimum energy path (MEP) leading to and from the transition state must pass through a configuration possessing at least one mirror plane perpendicular to the principal reaction axis. If the reactants and products are themselves chiral, the corresponding standard transition states …

2. Reaction Kinetics

   Linked via "Minimum Energy Path (MEP)"

   Here, $A$ is the pre-exponential factor (or frequency factor), $E_a$ is the activation energy, and $R$ is the ideal gas constant. The pre-exponential factor, $A$, is related to the frequency of collisions between reactant molecules that possess the correct spatial orientation for reaction. In viscous solutions, $A$ often includes a steric hindrance factor ($\rho$) derived from the principle…