Lucas test (ZnCl₂/HCl) for alcohol classification (Acid-catalyzed substitution to alkyl chloride; turbidity timing distinguishes alcohol)
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Acid-catalyzed substitution to alkyl chloride; turbidity timing distinguishes alcohol classes
What each symbol means
| Symbol | What it stands for |
|---|---|
| ROH | Alcohol |
| ZnCl₂ | Lewis acid catalyst (Lucas reagent component) |
When to use this
Anhydrous ZnCl₂ with conc. HCl; immediate turbidity 3°, delayed 1°; works best for ≤ six carbons in teaching examples.