= Outer sphere electron transfer
{wiki=Outer_sphere_electron_transfer}
Outer sphere electron transfer refers to a type of electron transfer mechanism that occurs in redox (reduction-oxidation) reactions where the reactants do not undergo significant structural changes during the process. In this mechanism, the electron transfer occurs through the outer sphere of the reactant species without the need for direct contact or significant overlap of their inner spheres (the regions that involve the electron-donating and electron-accepting atoms or groups).
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