Question

Why cl is ortho para directing but deactivating group?

Answer 1

$\huge\purple{Assalamualykum}$


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$\huge\red{Ortho para directing :-}$

Those substituents that directs the incoming substituents to attach to the ortho or para position are called ortho para directing groups .

Ortho para directing groups are ring activators .

$\huge\orange{Exception:- }$

Except for halogens which are ortho para dirdcting but still they are ring deactivators .

$\huge\green{Your Question :- }$

Cl is ortho para directing but deactivating group .


$\huge\blue{Answer:-}$


Cl has large electron affinity so it withdraws electrons from benzene ring making further substitution difficult .


Cl also gives its electrons to benzene ring , these lone pair of electrons revolve around benzene ring which creates resonance so it deactivates ring


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$\huge\pink{INSHALLAH it will help U}$