Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid
Channel: Doubtnut
Date: 29/03/2020

Alkylation of aromatic compounds with aliphatic compounds like halides in presence of Lewis acid catalyst is known as Friedel-Crafts alkylation. It is an exapmle of electrophilic substitution. ltimg src=\"https://d10lpgp6xz60nq.cloudfront.net/physics_images/GRB_ORG_CHM_P1_C05_E01_316_Q01.png\" width=\"80%\"gt In the process of acylation, `R-overset(O)overset(||)C-` group is introduced to the ring. Compounds having (`+` mesomeric groups) like `-NH_(2)` do not give Friedel-Crafts reaction because these compounds undergo conjugation with the catalyst. In the alkylation process, most branched alkyl group is substituted because isomerisation of carbonium ion takes place. In some Friedel-Crafts reactions, the nature of product changes with the solvent used in the reaction. Predict whether the following statements are ture or false: When benzene is treated with `CHCl_(3)` in presence of `AlCl_(3)` catalyst, the following reaction takes place: ltimg src=\"https://d10lpgp6xz60nq.cloudfront.net/physics_images/GRB_ORG_CHM_P1_C05_E01_316_Q02.png\" width=\"80%\"gt (a) True (b) False