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Here is my proposed mechanism, something tells me that the intramolecular deprotonation happens after, and that this is not concerted. Is my mechanism correct? My[![Friediel Crafts Acylation mechanism

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    $\begingroup$ Don’t draw it concerted. It is a stepwise process; the attack of the aromatic electrons onto the electrophile first with a delocalised carbocation as intermediate followed by deprotonation and rearomatising. $\endgroup$ – Jan May 2 '16 at 12:58

The reactivity of acid chlorides and acid anhydrides are actually quite similar. It may be helpful for you to think of an acid anhydride like this:

$\hspace{5cm}$anhydride-chloride comparison

When we do, the acylation reaction is almost identical to that of an acid chloride:

step 1

step 2

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  • $\begingroup$ Thank you very much! I also thought that possibility but I got a little muddled, cheers for the clarity. $\endgroup$ – Michael Nguyen May 2 '16 at 18:00

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