https://doi.org/10.1351/goldbook.E02012

The term indicates a sequence of reactions such as shown in equations (1)–(3), leading from A to B :

An analogous sequence involving radical cations (A^{+}·, B^{+}·) is also observed. The most notable example of electron-transfer catalysis is the S RN 1 (or T + D N + A N) reaction of aromatic halides. The term has its origin in a suggested analogy to acid-base catalysis, with the electron instead of the proton. However, there is a difference between the two catalytic mechanisms, since the electron is not a true catalyst, but rather behaves as the initiator of a chain reaction. 'Electron-transfer induced chain reaction' is a more appropriate term for the situation described by equations (1)–(3).*Source: *

PAC, 1994,*66*, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1110 (https://doi.org/10.1351/pac199466051077)

\[\text{A} + \text{e}^{-} \rightarrow \text{A}^{\cdot- }\] | (1) |

\[\text{A}^{\cdot- } \rightarrow \text{B}^{\cdot- }\] | (2) |

\[\text{B}^{\cdot- } + \text{A} \rightarrow \text{B} + \text{A}^{\cdot- }\] | (3) |

PAC, 1994,