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The cation radical interacts with the free-radicals from PE molecule fragment through electron transfer that to be deoxidized, inducing the formation of carbenium ions and increasing the reaction course of cationic polymerization.
The phenonium ions interact with carbenium ions in a manner of electron transfer, resulting in reduction of cationic polymerization course ultimately.
The first carbenium ion I undergoes hydrogen shifts to form carbenium ions II, III, V and rearranges to IV by methyl shift.
The propagating carbenium ion combines with counterion
p-benzoquinone acts as an inhibitor as the transfer of protons from the propagating carbenium ion and/or initiator-protonated species to form p-hydroquinone.
Since 1963 Olah and his coworkers have used superacid media, particularly [HSO.sub.3.F] - [SbF.sub.5], to obtain stable solutions of a wide variety of alkyl carbenium ions. [7] The [HSO.sub.3.F] - [SbF.sub.5] superacid is widely known as magic acid.
Some of these carbenium ions (or their diazoprecursors) obviously do not alkylate DNA (initiation of a tumor), if the electrical charge distribution would not favor SN 1- or SN 2- reactions in organisms.
Bolte: Ladungsverteilung in carbeniumionen und carcinogenitat von nitrosaminen, Kautschuk + Gummi, Kunststoffe 41 (11/1988) 1097- Charge distribution in carbenium ions and carcinogenicity of nitrosamines.