Question

Which of the following is true regarding electromeric effect?

• A. Involves complete shifting of $\pi$ electrons.
• B. It is a temporary effect.
• C. In -E effect , $\pi$ electrons of the multiple bond are transferred to the atom to which the reagent gets attached.
• D. It operates in organic compounds having multiple bonds under the influence of an outside attacking species.

Answer 1

Answer: (A), (B), (D)

The correct options are
A Involves complete shifting of $\pi$ electrons.
B It is a temporary effect.
D It operates in organic compounds having multiple bonds under the influence of an outside attacking species.

Electromeric effect :
Operates in organic compounds having multiple bonds under the influence of an outside attacking species.
It is temporary effect, since it is observed only in presence of attacking reagent.
Involves complete shifting of $\pi$ electrons.

Types of electromeric effect :

+E effect : $\pi$ electrons of the multiple bond are transferred to the atom to which the reagent gets attached.

-E effect : $\pi$ electrons of the multiple bond are transferred to the atom to which the reagent does not get attached.