Question

halogen are deactivating still they are O and P directing​

Answer 1

Answer:

Halogens bonded to benzene ring has three lone pairs. These three electron pairs can cause resonance in benzene ring. But, halogens are also highly electronegative and thus they have strong -I effect.

Answer 2

Answer:

halogens ortho para are directing even though deactivating. Halogens bonded to benzene ring has three lone pairs. These three electron pairs can cause resonance in benzene ring. But, halogens are also highly electronegative and thus they have strong -I effect.