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Aryl halides do not undergo uncleophilic...

Aryl halides do not undergo uncleophilic substitution reactions under ordinary conditions because
(1) Approach of nucleophile is retarded
(2) Carbon carrying halogen atom is `sp^(3)` hybridised
(3) The substrate molecule is destabilised due to resonance
(4) Partial double bond character between carbon and halogen

A

2 and 4 only

B

1 and 4 only

C

2 and 3 only

D

2, 3 and 4 only

Text Solution

Verified by Experts

The correct Answer is:
B
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Read the passage given below and answer the following questions: Aryl halides are extremely less reactive towards nucleophilic substitution reactions due to the following reasons: (i) In haloarenes, the electron pairs on halogen atom are in conjugation with u-electrons of the ring. (ii) In haloalkane, the carbon atom attached to halogen is sp^3 hybridised while in case of haloarene, the carbon atom attached to halogen is sp^2 -hybridised. In case of haloarenes/ the phenyl cation formed as a result of self-ionisation will not be stabilised by resonance. Which of the following alkyl halides will undergoes S_N1 reaction most readily ?

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