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A group which is ring deactivating towards electrophilic substitution but decreases incoming group towards -O and -P positions is
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a
NH2
b
NO2
c
Cl
d
CH3
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Correct option is C
Halogens are ring deactivating but -O, -P-directors.In the case of aryl halides, halogens are moderately deactivating. Because of their strong – I effect, overall electron density on benzene ring decreases. It makes further substitution difficult. However, due to resonance the electron density on o– and p– positions is greater than that at the m-position. Hence, they are also o– and p – directing groups.Talk to our academic expert!
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