Question

Complete the mechanism for generation of the electrophile used for bromination in electrophilic aromatic substitution. Add curved arrows, bonds, electron pairs, and charges where indicated.

Answer 1

Concepts and reason

Bromination:

Bromine acts as an electrophile in the electrophilic aromatic substitution reaction. It reacts with pi electrons; C=C of benzene (act as a nucleophile) in the presence of gives bromobenzene.

Fundamentals

Bromination: A bromination reaction is the addition of a bromine atom on a reactant molecule through electrophilic substitution mechanism. The reagent is which generates ion as an electrophile that reacts with a nucleophilic centre on the benzene ring. The selectivity of substitution on the benzene ring depends on the type of substituent present on it. For example,

Arrow Pushing in Chemistry:

Arrow pushing is a technique to indicate the movement of electrons in the organic reaction mechanisms.

Arrow Pushing Rule:

The curved arrow (double head) for a pair of electrons indicates the movement of an electron pair.

Double head arrow

Mechanism:

Ans: