(a) Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes and vinylic halides?
(b) Name the possible alkenes which will yield 1-chloro-1-methylcyclohexane on their reaction with HCl. Write the reactions involved.
OR
(a) Allyl chloride is hydrolyzed more readily than n-propyl chloride. Why?
(b) Identify the major product formed when 2-cyclohexylchloroethane undergoes a dehydrohalogenation reaction. Name the reagent, which is used to carry out the reaction.

Question

(a) Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes and vinylic halides?

(b) Name the possible alkenes which will yield 1-chloro-1-methylcyclohexane on their reaction with HCl. Write the reactions involved.

OR

(a) Allyl chloride is hydrolyzed more readily than n-propyl chloride. Why?

(b) Identify the major product formed when 2-cyclohexylchloroethane undergoes a dehydrohalogenation reaction. Name the reagent, which is used to carry out the reaction.

Accepted Answer

a) Haloarenes and vinylic halides are less reactive towards nucleophilic reactions with the partial double bond character between C-X bonds.

(b) Question Image

OR

(a) Allyl chloride is hydrolyzed more readily than n-propyl chloride due to the presence of π- bond in allyl carbocation. Allyl chloride shows resonance and gets stabilized.

(b) The reagent used in the dehydrohalogenation reaction is ethanolic KOH.

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