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AP EAMCET20224 Jul 2022Morning ShiftChemistryHaloalkanes and HaloarenesActual

When 1 -chloro butane is treated with aqueous KOH it gives P . However, when it is treated with alcoholic KOH it gives Q . Identify the products P and Q respectively

Correct answer

3

Step-by-step solution

In presence of aqueous KOH, 1-chlorobutane undergoes nucleophilic substitution( S N 2 mechansim) to from butan-1-ol ​​​​​​​ Alcoholic KOH dissociates in water to give RO - ion which is a strong base. It abstracts hydrogen, giving rise to elimination in reaction. Hence in the presence of alcoholic KOH, dehydro halogenation(beta elimination) takes place to form but-1-ene, where the cabocation intermediate is formed.

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