Question

The strongest base among the following is

• A. ${{C}_{6}}{{H}_{5}}N{{H}_{2}}$
• B. ${{({{C}_{5}}{{H}_{5}})}_{2}}NH$
• C. $N{{H}_{3}}$
• D. ${{({{C}_{2}}{{H}_{5}})}_{2}}NH$

Answer 1

Answer: (D)

${{({{C}_{2}}{{H}_{5}})}_{2}}NH$

Answer 2

The correct answer is Option D) ${{({{C}_{2}}{{H}_{5}})}_{2}}NH$

The basic nature of amines is due to the presence of lone pair of electronson the nitrogen atom which is available for the bond formation with Lewis acid. Due to the $+I$ effect, $2{}^\circ$ amine is more basic than $1{}^\circ$ amine and $N{{H}_{3}}$ . In the case of aromatic amines, the lone pair on the nitrogen atom are involved in resonance, therefore not available for bond formation, so aromatic amines are less basic. Hence, $(C_2H_5)_2NH$ is the strongest base among the given.

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