Write structures of different isomers corresponding to the molecular formula, `C_(3)H_(9)N.` Write IUPAC names of the isomers which will liberate nitrogen gas on treatment with nitrous acid.

Explanation

Four structural isomers are possible
`underset((1^(@)))underset("Propan-1-amine")(CH_(3)CH_(2)CH_(2)NH_(2))` `underset((1^(@)))underset("Propan-1-amine")(CH_(3)-underset(NH_(2))underset(|)CH-CH_(3))` `underset((2^(@)))underset("N-Methylethanamine")(CH_(3)-NH-C_(2)H_(5))` `underset((3^(@)))underset("N,N-Dimethylmethanamine")(CH_(3)-underset(CH_(3))underset(|)N-CH_(3))`
Only `1^(@)` amines react with `HNO_(2)` to liberate `N_(2)` gas
`underset("Propan-1-amine")(CH_(3)CH_(2)CH_(2)NH_(2)) + HNO_(2) to underset("Propan-1-ol")CH_(3)CH_(2)CH_(2)OH + H_(2)O + N_(2)`