Q.1. - Organic Chemistry

Question

Question: Draw all possible resonance structures for the antihistamine diphenhydramine, the active ingredient in Benadryl.

Step-by-Step Solution

Answer

Answer

Resonating structures of diphenhydramine.

 

Step 1: Resonance structures

Some properties of an organic compound, that cannot be explained by a single structure are explained using multiple structures.

 

That differs only in the position of $\mathbf{\pi }$ bond or nonbonding electrons are called resonance or canonical structures.

Step 2: Resonance structures for diphenhydramine

Resonating structures are drawn by only moving the $\mathrm{\pi }$ bonds (atoms or groups never change their position).

Resonance structures for diphenhydramine