What is electromeric effect(E effect). explain with suitable example?
Electromeric effect :
Electromeric effect is a temporary effect and observed only in organic compounds with multiple bonds in the presence of an attacking reagent.
Electromeric effect may be defined as the complete transfer of shared pair of pi electrons of multiple bonds to one of the atoms in presence of an attacking reagent.
+E effect: In the positive electromeric effect the pi electrons of the multiple bond are transferred to that atom to which the attacking reagent is bonded.
-E effect: When the pi electrons of the multiple bond are transferred to the atom to which the attacking reagent does not get attached is called the negative electromeric effect.
