An outer-sphere @[email protected] is a reaction in which the @[email protected] takes place with no or very weak (\(4-16\ \text{kJ mol}^{-1}\)) electronic interaction between the reactants in the @[email protected] If instead the donor and the acceptor exhibit a strong electronic @[email protected], the reaction is described as @[email protected] The two terms derive from studies concerning metal complexes and it has been suggested that for organic reactions the terms 'nonbonded' and 'bonded' @[email protected] should be used.
See also:
inner-sphere electron transfer
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1148 [Terms] [Paper]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2257 [Terms] [Paper]