Reactivity order towards a nucleophile is
Mesomeric or Resonance effect -
Migration of lone pair or electron in a conjugated system.
- wherein
It is a permanent effect
Inductive effect explain many different characteristic -
(a) Greater reactivity of alkyl halides as compared to alkanes
(b) Relative strength of carboxylic acid
(c) Relative basic strength of amines
-
has more – l and less + M effect.