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    Chemistry of Radicals
    (Institute Chemistry Ceylon, 2023-01) K. Sarath D. Perera
    Free radicals can be defined as chemical species (atom, molecule or ion) which have a single unpaired valence electron. Triplet O2 and triplet carbene (:CH2) have two unpaired electrons. Homolytic cleavage of Cl2 or Br2 by thermally or photochemically produces two Cl• or Br• radicals.