10.8 Kinetics of reactions in solution (2) Theoretical model-solvent cage 1934. J. Franck and E. Rabinowitch established that. once reactant molecules meet in one solvent cage through diffusion (an encounter), they will be trapped in the cage for a relatively long time during which they collide repeatedly with each other, providing more chance to react Solvent cage: capture reactant molecules diffuse Within a solvent cage(for 1-100 ns),two in or out from or to other solvent cages reactant molecules can collide 10 105 times(2) Theoretical model—solvent cage Solvent cage: capture reactant molecules diffuse in or out from or to other solvent cages. 1934, J. Franck and E. Rabinowitch established that, once reactant molecules meet in one solvent cage through diffusion (an encounter), they will be trapped in the cage for a relatively long time during which they collide repeatedly with each other, providing more chance to react. Within a solvent cage (for 1~100 ns), two reactant molecules can collide 10 ~105 times. 10.8 Kinetics of reactions in solution