Homework Answers
Lucas test is used to distinguish between Primary, Secondary, Tertiary alcohols.
Lucas reagent: conc.HCl and anhydrous ZnCl2
1) Tertiary alcohols give turbidity immediately with Lucas reagent.
R3C-OH + conc.HCl/anhydrous ZnCl2 ------------------> R3C-Cl + H2O
2) Secondary alcohols give turbidity in 5 min with Lucas reagent.
R2CH-OH + conc.HCl/anhydrous ZnCl2 ------------------> R2CH-Cl + H2O
3) Primary alcohols do not react with Lucas reagent, hence no turbidity will be formed.
RCH2-OH + conc.HCl/anhydrous ZnCl2 ------------------> No reaction
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Phenol also do not react with Lucas reagent, hence no turbidity will be formed. Because, in lucas test carbocation will be formed. Phenol cannot form carbocation with Lucas reagent.
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for
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Cyclohexanol
for iron chloride test:
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Cyclohexanol
O-cresol
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Please help with equations.
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for
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Ethanol
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Cyclohexanol
for iron chloride test:
Ethanol
2-propanol
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