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
The phenonium ions interact with carbenium ions in a manner of electron transfer, resulting in reduction of cationic polymerization course ultimately.
The dispersion products generated in the EB irradiation to composite target is composed of the free-radical fragment and carbenium fragment, resulting in that radical polymerization and cationic polymerization can be simultaneously observed in the formation of EBD coatings.
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.
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