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Is fluorobenzene or chlorobenzene more reactive towards SNAr ( Substitution Aromayic Nucleophilic Reaction) ? I heard it is fluorobenzene but shouldn't it be chlorobenzene because chlorine deactivates the benzene ring more than fluorine?
Asked by sumayiah2000 | 25 Apr, 2019, 01:53: PM
answered-by-expert Expert Answer
In Substitution aromatic nucleophilic reaction, A negatively charged complex(Meisenheimer Complex) is formed.This negatively charged complex will be more stable in fluorobenzene as compared to chlorobenzene because of high -I effect of Fluorine. So due to stablisation of product intermediate reaction fluorobenzene is more reactive than chlorobenzene.
Answered by Ravi | 26 Apr, 2019, 02:59: PM

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