Retrieving "Encounter Pair" from the archives

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1. Bimolecular Reaction

   Linked via "encounter pair"

   The Cage Effect is a critical phenomenon in liquid-phase kinetics. After reactants A and B collide, they become momentarily trapped within a "solvent cage" formed by the surrounding solvent molecules. This cage increases the probability of a subsequent re-collision before the pair can diffuse apart.
   If the lifetime of the encounter pair $(\text{A} \cdots \text{B})$ is significantly longer than the time required for bond formation, the observed [rate constant](/entries/r…