Question

The increasing basicity under of the following compounds is :

$\left(A\right)$ $C{H}_{3}C{H}_{2}N{H}_2$

$\left(B\right)$ $C{H}_{3}C{H}_2\stackrel{C{H}_{2}C{H}_3}{\stackrel{|}{NH}}$

$\left(C\right)$ $H_{3}C-\stackrel{C{H}_3}{\stackrel{|}{N}}-C{H}_3$

$\left(D\right)$ $Ph-\stackrel{C{H}_3}{\stackrel{|}{N}}-H$

• A. $D<C<A<B$
• B. $A<B<D<C$
• C. $A<B<C<D$
• D. $D<C<B<A$

Answer 1

Answer: (A)

$D<C<A<B$

$(C_2{H}_5{)}_{2}NH>C_2{H}_5{NH}_2>(C{H}_3{)}_3-N>Ph-\stackrel{\stackrel{{CH}_3}{|}}{N}-H$

-I effect of phenyl decreases basicity. Rest all alkyl group show +I effect and their basicity order is as mentioned above. Hence option A is correct