Reaction of organocuprates and organocadmium compounds with acyl halides
Organocuprates and organocadmium compounds are organometallic reagents very different from organolithium and Grignard reagents. Their C–metal bonds are much less ionic and the carbon is much less nucleophilic.
▶ Watch the video on YouTube
They are much weaker nucleophiles, able to attack only very activated carbonyl groups such as acyl chlorides. The resulting ketone cannot be attacked by these Cu and Cd organometallic reagents.