Write structures and IUPAC names of
(i) the amide which gives propanamine by Hoffmann bromamide reaction.
(ii) the amine produced by the Hoffmann degradation of benzamide.

Explanation

(i) Propanamine contains three carbons. Hence, the amide molecule must
contain four carbon atoms. Structure and IUPAC name of the starting
amide with four carbon atoms are given below:
`CH_(3)-CH_(2)-CH_(2)-underset(O)underset(||)C-NH_(2)" " "Buanamide"`
(ii) Benzamide is an aromatic amide containing seven carbon atoms.
Hence, the amine formed from benzamide is aromatic primary amine
containing six carbon atoms.