Question

which position are occupied by NO2 group during nitration of phenol​

Answer 1

Answer:

Nitro group will occupy the position in which it is most stable.

Nitro group wants electrons since it has -M effect.

So in ortho and para positions,NO2 will be attached only.

In meta position,there is no mesomeric effect and hence no stability.

But, the ortho is the best such position since DNP rule exists.