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Why haloalkanes are more reactive than …

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Why haloalkanes are more reactive than haloarenes

Posted by Gagleen Kaur 8 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Pardeep Singh 8 years, 2 months ago

In Nucleophilic substitution reactions aryl halides (haloarenes) are less reactive due to the following reasons: The primary reaction of aromatic compounds is Electrophillic addition because of the aromaticity which benzene posseses. Benzene itself acts as a nuceophile which isn't in the favour of nucleophilic substitution reactions. Also, in haloarenes the C-X bond (carbon halogen bond) has a double bond characters due to the lone pair of halogens. Whereas the C-X bond in alkyl halides is comparitively weaker with respect to the resonance stabilised C-X bond in aryl halides. Thus we can conclude that haloalkanes are more reactive than haloarenes.

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