Question

In friedel crafts acylation experiment, we put benzene, AlCl3. And add the RCOCl dropwise. why dropwise the RCOCl?

Answer 1

In friedel craft acylation reaction acyl chloride adds to AlCl is drop wise because the reaction between aluminium Chloride & acyl chloride is highly exothermic so the rate of reaction should be controlled so that the solution I do not boil. Therefore acylchloride adds to aluminium chloride drop wise. الابداع الان لے عالم R-c=0 < R-co + AICI addition of Above reaction is exothermic so Lacul chloride must be drop wise.

1 Friedel craft acrylation reaction - Aromatisation Acyl benzene Acylation of benzene ring : L Here pi electron of benzene attacks on elecbon deficient carbon gives intermediate carbocation. Finally aromatization of benzene gives acyl benzene product