Nitrogen Containing CompoundMedium

Question

The correct order of decreasing basic strength of the given amines is:

Options

A.N -methylaniline $>$ benzenamine $>$ ethanamine $> N$-ethylethanamine
B.N -ethylethanamine $>$ ethanamine $>$ benzenamine $> N$-methylaniline
C.N-ethylethanamine > ethanamine > N-methylaniline > benzenamine
D.benzenamine $>$ ethanamine $> N$-methylaniline $> N$-ethylethanamine

Solution

Sol. [Key Concept: Order of decreasing basic strength of the given amines]

Lower is the value of ${pK}_{b}$, higher is the basicity

Also aliphatic amines are stronger bases than aromatic amines.

${pK}_{b}$ : Benzenamine > N-Methylaniline > Ethanamine > N-Ethylethanamine

Basic strength:

N-Ethylethanamine > Ethanamine > N-Methylaniline > Benzenamine

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