Question

what is mesomeric effect in benzene​

Answer 1

$\huge\underline\mathfrak\red{Answer:}$

If π electrons move away from the group, and towards the rest of the molecules, the effect is called +M effect ( Mesmeric effect ) .Eg : Donation of electrons from amino group into benzene ring.

Answer 2

Explanation:

The electron with drawing or releasing effect attributed to a substituent through delicalization of p electrons, which can be visualized by drawing various canonical forms ,is known as mesomeric effect.