How To Draw Resonance Structures?

What are the rules for drawing resonance structures?

Rules to remember for recognising resonance structures:

  • Atoms never move.
  • You can only move electrons in π bonds or lone pairs (that are in p orbitals)
  • The overall charge of the system must remain the same.
  • The bonding framework of a molecule must remain intact.

How do you find resonance structures?

Because resonance structures are the same molecules, they must have:

  1. The same molecular formulas.
  2. The same total number of electrons (same overall charge).
  3. The same atoms connected together. Although, they can differ in whether the connections are single, double or triple bonds.

How do you draw Lewis resonance structures?

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Drawing Lewis Structures: Resonance Structures – Chemistry


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What is a resonance structure example?

A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures or canonical forms). Such is the case for ozone (O3), an allotrope of oxygen with a V-shaped structure and an O–O–O angle of 117.5°.