Q. 623.7( 3 Votes )

Which of the following haloalkanes reacts with aqueous KOH most easily? Explain giving reason.

(i) 1-Bromobutane

(ii) 2-Bromobutane

(iii) 2-Bromo-2-methylpropane

(iv) 2-Chlorobutane

Answer :

Haloalkanes will react with aqueous KOH to undergo nucleophilic substitutions. Out of the given compounds, the tertiary halide 2-Bromo-2-methylpropane will react with aq. KOH most easily because the first step will involve cleavage of the alkyl group and the halide group, leading to formation of the very stable carbocation.

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