Question

Among NH3+ ,primary , secondary and tertiary which group shows maximum -I effect

Answer 1

There are two categories of inductive effects: the electron withdrawing (-I effect) and the electron releasing (+I effect). The latter is also called the electron donating effect.

-I effect:
The -I effect is seen around a more electronegative atom or group, and electron density is higher there than elsewhere in the molecule. Electron-withdrawing groups include halogen, nitro , cyano , caboxy , ester…

Therefore, the order of -I effect is ammonia>primary>secundary>tertiary.