CCl3 is weakly deactivating group. It deactivates through negative inductive effect, aldo we can explain on the basis of hyperconjugation on same lines as we do for Ch3 group.
I'd just like to mention that for hyperconjugation in CCl3, the pair of electrons in the bond go to the chlorine atom, not the carbon atom. (They go to the carbon atom in CH3.)
Moderation Team
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bond go to the chlorine atom, not the carbon atom. (They go to the carbon atom in CH3.)
