Question

of
Explain the meaning of - I and + I effect. Arrange the following in order
decreasing - I effect.
-CN, -NO2, -COOH, N(Me)4, -Ph
​

Answer 1

Answer:

-N(Me)4 > -NO2 > -CN > -COOH > -ph

Explanation:

-i effect order

1. NF3 > N(R)3 > NH3 > NO2 > CN > -CHO > -C=O >-COOH > F > cl> Br > I > -OR >-OH

Answer 2

INDUCTIVE EFFECT - DEFINITION

When a covalent bond is formed between atoms of different electronegativity , the electron density is more towards the more electronegative atoms of the bond,such a shift in electron density is called as inductive effect.

Example : CH3

CH 2

Cl in this molecule chlorine is a electronegative atom always shift electron pair towards it self.

-CN<-NO2< -COOH<N(Me)4 <-Ph