Account for the following
(i)Primary amines `(R-NH_(2))` have higher boiling point than tertiary amines `(R_(3)N)`
(ii) Aniline does not undergo friedel - crafts reaction
(iii) `(CH_(3))_(2)` NH is more basic than `(CH_(3))_(3)N` in an aquaous solution

Explanation

(i) Due to maximum intermolecualr hydrogen bonding in primary amines (due to presence of more number of H atoms) primary aminal have high BP in comp[arison to tertiary amines
(ii) Aniline does not undergo Fredel craft reaction due to acid base reaction betweenn basic compound salt is formed with AI `CI_(3)` As a result ,N of aniline acquires (+) ve charge hence act strong deactivating group
(iii) In `(CH_(3))` N there is maximum steric hindrance and least solvation but in `(CH_(3))` NH the solvatin is more and the syeric hindrance is less than in `(CH_(3))` although + I effect is less since there are two methyl goup dimethly amine is stilell a stronger base than trimethl amine
(i) `C_(6)H_(5)NO_(2)overset(Sn_HCI)rarr(A)`