MCQ
The reaction of Lucas reagent is fast with
- ✓${\left( {C{H_3}} \right)_3}COH$
- B${(C{H_3})_2}CHOH$
- C$C{H_3}{(C{H_2})_2}OH$
- D$C{H_3}C{H_2}OH$
✓
Answer
Correct option: A.
${\left( {C{H_3}} \right)_3}COH$
a
Lucas test is a test to recognize whether the given alcohol is primary, secondary or tertiary in nature. Lucas reagent is a mixture of conc. $HCl$ and dry anhydrous $ZnCl$.
Lucas test is a test to recognize whether the given alcohol is primary, secondary or tertiary in nature. Lucas reagent is a mixture of conc. $HCl$ and dry anhydrous $ZnCl$.
In this reaction, carbocation is formed as an intermediate and thus the stability and ease of carbocation formation determine the rate of the reaction as that's the slow step of the mechanism.
Hence the order of reactivity is tertiary alcohol $ > $ secondary alcohol $ > $ primary alcohol by $SN ^1$ mechanism.
Thus $C \left( CH _3\right)_3 OH$ being tertiary alcohol will react most readily with Lucas reagent.
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