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| 1. |
Friedel-Crafts acylation requires an excess of the catalyst but Fredel-Crafts alkylation requires only a catalytic amount. Why? |
| Answer» Solution :The product of ACYLATION co-ordinates with the catalyst and removes the latter from the reactant side and thereby stops further acylation. For this reason, Friedel-Crafts acylation requires an excess of the catalyst. The product of alkylation does not co-ordinate with the catalyst. So, the catalyst can FORM COMPLEX with the alkylating agent and the catalyst PROPAGATES the reaction. | |