5 Rank the compounds from most reactive to least reactive in

5. Rank the compounds from most reactive to least reactive in electrophilic aromatic substitution reactivity. (d pts CH3 OCH CO.H IV b. III> ISIPIV I>N>111 > 11

Solution

Answer option C) I > IV > III > II

electron donating group will increase the reactivity of aromatic ring towards electrophilic substitution. Electron withdrawing group will decrease the reactivity.

Electron donating abilities of the following groups

OCH3 >> CH3 = CH2CH3 > CH3-C=O > CO2H

Alkoxy and alkyl groups are electron donors whereas ketone and carboxylic acid groups are electron acceptor.