Transformation of OH-adduct of 1-chloro-4-iodobutane into intra-molecular radical cation in neutral aqueous solution

The iodine centered OH-adduct formed on reaction of ⋅OH radicals with 1-chloro-4-iodobutane in neutral aqueous solution transforms (k=5.4×105 s−1) to an intra-molecular radical cation (). The unfavorable structural conformation of solute radical cation generated on reaction of ⋅OH radicals with 1-chloro-5-iodopentane does not allow the transformation of OH-adduct into an intra-molecular radical and instead a dimer radical cation () is formed.