Question

Why -OH group attached to benzene ring is o,p directing while - CHO group is meta directing in nature

Answer 1

Answer:

because OH is an electron donating group and CHO is an electron withdrawing group.

EDG like OH , OR , SH, NH2, NHR etc are ortho para directing and EWG like CHO, COOH, COOR , CN, ketone etc are meta directing