Which of the following primary amines yields tertiary nitrogen compounds on oxidation with potassium permanganate ?

Options

A. `RCN_(2)NH_(2)`
B. `R_(2)CHNH_(2)`
C. `R_(3)CNH_(2)`
D. Both (2) and (3)

Answer

C

Explanation

Oxidation of t-alky1 amines with `KMnO_(4)`
`R-underset(R)underset(|)overset(R)overset(|)C-NH_(2)overset(KMnO_(4))rarrR-underset(R)underset(|)overset(R)overset(|)C-NO_(2)`
Here the maine must be primary and -`NH_(2)` group should be bonded to a tertiary carbon atom
`RCH_(2)NH_(2)overset[(O)]rarrRCHunderset(aldi mi n e)(=NH)overset(Ho+)rarrRCHO+NH_(3)`
`R_(2)CHNH_(2)overset(O)rarrunderset(Ketimin e)(R_(2)C=NH)overset (H^(o+))rarrR_(2)CO+NH_(3)` .