Choose the letter corresponding to the incorrect completion. A to E is incorrect. Choose the letter corresponding to the incorrect completion. Which one of the following statements is an incorrect description of heterolytic fission of a bond. Ultraviolet light promotes the fission.
Fission gives rise to the formation of ions.
Carbonium ion formation and a 1,2-hydride shift. Carbonium ion formation and a 1,2-alkyl shift. Carbonium ion formation, a 1,2-alkyl shift and loss of a proton to give the most highly substituted olefin. 187 Electrophilic substitution in aromatic compounds may proceed via sigma-complex formation. Indicate which one of the following statements is incorrect with regard to this mechanism.