EAS Series: Video 7
This video shows you the mechanism for the formation of acylium ion with a Lewis Acid catalyst to form the super electrophile that is attacked by benzene in the Friedel-Crafts Acylation reaction.
(Watch on YouTube: Acylation. Click CC on bottom right for transcript.)
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At 3:25: “In a choice between a complete octet positive oxygen, or incomplete octet double-bound postive carbon, the oxygen is more stable”
You meant to say “In a choice between an [incomplete*] octet…” right? I just want to make sure as it confused me.