A) \[{{({{C}_{2}}{{H}_{5}})}_{2}}NH\]
B) \[{{(C{{H}_{3}})}_{2}}NH\]
C) \[{{({{C}_{2}}{{H}_{5}})}_{3}}N\]
D) \[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]
Correct Answer: A
Solution :
\[{{({{C}_{2}}{{H}_{5}})}_{2}}NH\] is maximum basic due to the \[+I\]-effect, but \[{{({{C}_{2}}{{H}_{5}})}_{3}}N\] is less basic than \[{{({{C}_{2}}{{H}_{5}})}_{2}}NH\]due to steric effect. Basic strength \[\alpha =\frac{+I\,effect}{steric\,effect}\]
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