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Why hallo arenes are less reactive …

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Why hallo arenes are less reactive than hallo alkanes?

    • Posted by Pinky Verma 7 years, 3 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Chirag Goel 7 years, 3 months ago

    1.On the basis of resonance:- =} If we draw the resonating structures of haloarenes , aryl halides gets partial double bond in b/w C=X which require large amount of energy to break whereas in alkyl halides , no resonance takes place and C-X having single bond character i.e., aryl halides are less reactive 2.On the basis of hybridisation:- =} In aryl halides , carbon is SP^2 hybridised. So, bond length becomes shorter , bond strength increases and its reactivity deacreases.Whereas haloalkanes are sp3 hybridised so less bond strength and high reactivity.

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