The reaction of Lucas reagent is the fastest with_________?
Correct answer: D. (CH3)3COH
- A. (CH3)2CHOH
- B. CH3(CH2)OH
- C. CH3CH2OH
- D. (CH3)3COH
Explanation
Lucas reagent reacts fastest with tertiary alcohols because the reaction proceeds through a relatively stable tertiary carbocation, giving rapid substitution and cloudiness. (CH3)3COH is tertiary, whereas the other listed alcohols are primary or secondary. The likely wrong choice is (CH3)2CHOH, because students may confuse a secondary alcohol with a tertiary one.
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About Alcohols
Alcohols contain a hydroxyl group attached to a saturated carbon atom and are classified as primary, secondary or tertiary. Their nomenclature, hydrogen bonding, acidity, oxidation, dehydration, reaction with sodium and conversion to haloalkanes are covered, along with the distinction between alcohols and phenols, where the hydroxyl group is attached directly to an aromatic ring.
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