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The electrophilic substitution reaction between benzene and ethanoyl chloride What is acylation? An acyl group is an alkyl group attached to a carbon-oxygen double bond. If R represents any alkyl group, then an acyl group has the formula RCO-.he facts The most reactive substance containing an acyl group is an acyl chloride (also known as an acid chloride). These have the general formula RCOCl. Benzene is treated with a mixture of ethanoyl chloride, CH3COCl, and aluminium chloride as the catalyst. A ketone called phenylethanone is formed.
The reactions of amines with acyl chlorides (acid chlorides) We'll take the reaction between methylamine and ethanoyl chloride as typical. If you add concentrated methylamine solution to ethanoyl chloride, there is a violent reaction in the cold.t is these electrons which are attracted to positive parts of other molecules or ions. The reactions of primary amines with halogenoalkanes. You get a complicated series of reactions on heating to give a mixture of products-probably one of the most confusing sets of reactions you will meet at this level.