Question

Choose the correct order of basic strength?

• A. III >II >I
• B. III > I > II
• C. II >I > III
• D. I > II > III

Answer 1

The correct option is A III >II >I

The first step is refers to the image$.$

The order $\left(III\right)>\left(II\right)>\left(I\right).$

In case of compound $\left(I\right),\left(II\right)$ and $\left(III\right),$ compound $\left(II\right)$ have one me group having $+I$ effect at para position$.$ $\left(III\right)$ have me group at the ortho position$.$ So it pushed the electron towards $N$ atom and increases the electron density on $N$ atom$,$ it is more basic than other two$.$ $\left(I\right)$ have me group at meta position which does increase the density of electron on $N$-atom$.$ So it is less basic than the other two compound$.$