Answer:
(i)
Smaller the value of
,
larger the value of
.
Basic character of
is due
to lone pair of N-atom. In aniline (A) electron-density at N-atom is decreased as
this lone pair is used in delocalisation of Ti-electrons in benzene nucleus.
Thus,
is less
basic than
group
is electron donating group. This increases electron density at N-atoms. Thus,
is more basic
than
, Hence
Thus,
[1]
(ii) Nitration is done using HN03 (after protecting
group
by acetylation)
group
increases electron-density at o- and p-sites as shown
Due to presence of
group
is acidified
and thus
group is
now, electron-withdrawing making benzene nucleus electron-deficient at o- and p-sites
and only m-sites available but with decreased reactivity.
You need to login to perform this action.
You will be redirected in
3 sec