Complete the following reaction :
`C_(6)H_(6)+RCOClunderset("(Anhy.)")overset(AlCl_(3))to`

Explanation

To complete the reaction between benzene (C₆H₆) and an acyl chloride (RCOCl) in the presence of anhydrous aluminum chloride (AlCl₃), we can follow these steps:

### Step 1: Formation of the Electrophile
When acyl chloride (RCOCl) reacts with anhydrous AlCl₃, it forms an acylium ion (RCO⁺) and AlCl₄⁻. The aluminum chloride acts as a Lewis acid, accepting a lone pair from the chlorine atom of the acyl chloride, leading to the cleavage of the C-Cl bond.

**Reaction:**
\[ RCOCl + AlCl_3 \rightarrow RCO^+ + AlCl_4^- \]

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