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Chemistry · L5 · The three factors that set the electron-transfer rate

Driving force ΔG°, reorganization energy λ, and electronic coupling H_AB combine to set k_ET; the −ΔG° vs λ comparison then branches into the normal region, the activationless maximum, and the inverted region.

by @openstemUpdated Chemistry
Driving force ΔG°thermodynamic favorabilityElectron-transferrate k_ETReorganization energy λsolvent + inner-sphere distortion costElectronic coupling H_ABdonor-acceptor orbital overlapCompare-ΔG° to λNormal regionrate rises as -ΔG° growsActivationlessmaximum possible rateInverted regionrate FALLS as -ΔG° grows-ΔG° < λ-ΔG° = λ-ΔG° > λ

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