Which one of the following is not a primary amine ?

Options

A. Tert-butylamine
B. Ethylamine
C. Sec-butylamine
D. Dimethylamine

Answer

D

Explanation

Primary amine means `R- NH_(2)` group
`underset("tert-Butylamine (Primary amine)")(CH_(3)- underset(underset(CH_(3))(|))overset(overset(CH_(3))(|))(C)- NH_(2)) underset("Ethylamine (Primary amine)")(CH_(3)CH_(2)- NH_(2))`
`underset("sec-Butylamine(Primary amine)")(CH_(3)-underset(underset(NH_(2))(|))(CH)- CH_(2)- CH_(3)) underset("Isobutylamine (Primary amine)")(CH_(3)- underset(underset(CH_(3))(|))(CH)- CH_(2)NH_(2))`
`underset("Dimethylamine (Secondary amine)")(CH_(3)-NH- CH_(3))`