Dimethylaniline
= Dimethylaniline
<Dimethylaniline> here denotes N,N-<dimethylaniline>, $\mathrm{PhNMe_2}$. Its neutral amino group donates into the ring, but strong acid protonates <nitrogen> and changes the directing behavior.
= Dimethylaniline
<Dimethylaniline> here denotes N,N-<dimethylaniline>, $\mathrm{PhNMe_2}$. Its neutral amino group donates into the ring, but strong acid protonates <nitrogen> and changes the directing behavior.