An amine `(X)` on being heated with an excess of methy1 bromide produces diethyldimethy lammonium bromide The amine `(X)` is .

Options

A. `C_(2)H_(5)N(CH_(3))_(2)`
B. `C_(2)H_(5)NHCH_(3)`
C. `(C_(2)H_(5))_(2)NH`
D. `C_(2)H_(5)NH_(2)`

Answer

C

Explanation

`underset("Diethyldimethy lammonium bromide")(CH_(3)CH_(2)-underset(CH_(2)CH_(3))underset(|)overset(CH_(3))overset(|)(N^(+))-CH_(3)Brbar)`
Since the quaternary salt carries two ethy1 groups the amine `(X)` must be a `2^(@)` amine with two ethy1 groups
`(C_(2)H_(5))_(2)NH underset(Delta)overset(CH_(3)Br (excess))rarr(C_(2)H_(5))_(2)overset(+)N(CH_(3))_(2)Brbar` .