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Account for the statements : Arylhalides are extremely less reactive towards Nucelophilic substitution reactions . |
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Answer» Solution :Aryl halides are extremely less reactive towards nucleophilic substitution reactions due to following REASONS . `to` In aryl halides 'C' undergoes `SP^(2)` hybridised and it has greater S-character and ELECTRO negativity . So the C-X bond length is shorter . `to ` In aryl halides resonance effect plays in an important role . The ELECTRON pairs on halogen atom are in conjugation with `pi`-electrons of the ring.  In the above C - Br bond acquires apartial double bond nature due to resonance . This bond cleavage is difficult . `to` The PHENYL cation formed in aryl halides is not stabilised by resonance . |
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