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Resonance is a technique of describing the delocalized electrons in a molecule or ion that a single Lewis structure cannot describe. It is a phenomenon that explains the shifting of non-bonding electrons and pi bonds within the molecule.
Some molecules have two or more chemically equivalent Lewis electron structures, called resonance structures. Resonance is a mental exercise and method within the Valence Bond Theory of bonding that describes the delocalization of electrons within molecules.
Resonance plays an important part in a molecule’s reactivity and stability. It is important to understand how electrons move around within a molecule because as you start to get introduced to reactions and reaction mechanisms, the order in which the electrons move becomes critical.
16 gru 2021 · The discussion of resonance effect heavily relies on the understanding of resonance structures. Here we will focus on how to draw resonance structures (or resonance contributors) for organic chemistry species, and how to compare the relative stabilities between the structures.
Resonance structures are used when one Lewis structure for a single molecule cannot fully describe the bonding that takes place between neighboring atoms relative to the empirical data for the actual bond lengths between those atoms.
22 gru 2011 · Rule #1: Minimize charges. Rule #2: Full octets are favored. Rule #3: How stable are the negative charges? Rule #4: How stable are the positive charges? Today, let’s summarize everything we’ve learned about resonance structures in this unit. Table of Contents.
In cases in which more than one reasonable (plausible) Lewis structure can be drawn for a species, these structures are called resonance structures or resonance contributors. Resonance structures can be either equivalent or non-equivalent.
