A ketone-containing compound formed from benzene fused to a pinacone (a carbon skeleton with multiple hydroxyl or keto groups), used in organic synthesis.
From benzo- (benzene) + pinacone (from Greek pina- pine + -acone, a structural name for a carbon framework). Technical term from specialized synthetic chemistry.
Pinacol compounds are the chemist's Swiss Army knife—they're protective groups that scientists can put on and take off to hide reactive parts while they build new molecules, then reveal them later, like temporary scaffolding on a building.
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