Question

Which of the following is/are TRUE about electromeric effect ?

• A. It is a permanent effect.
• B. It is a temporary effect.
• C. It takes place only when a reagent is added.
• D. It vanishes when the attacking reagent is removed.

Answer 1

Answer: (B), (C), (D)

The correct options are
B

It is a temporary effect.

C

It takes place only when a reagent is added.

D

It vanishes when the attacking reagent is removed.

What is electromeric effect?

It is a temporary delocalisation of $\pi$-electron in compounds containing multiple covalent bonds,
e.g, $(C=C),(C=O),(C\equiv N),etc,.$

It takes place only when a reagent is added and vanishes when the attacking reagent is removed.
It is represented by a curved arrow($\curvearrowright$).