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What is resonance in organic chemistry?

Updated: 8/11/2023
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15y ago

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Resonance structures exist in organic and inorganic chemistry. Resonance structures refers to the ability to create (draw) a molecule in more than one way. However, one structure is usually favored over the other. Most of the time you will see these structures denoted with a (major) or (minor) next to it. This will indicate that the majority of the time that structure will be formed.

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9y ago
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15y ago

Resonance is the tendency of molecules to share electrons among atoms that are either double bonded or have unbonded electrons. Benzene rings are an excellent example of electrons shared in double bonds. Resonance increases stability in molecules.

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11y ago

Resonance is term used in valence bond theory which was coined by Pauling to describe the mixing of different possible electronic structures to produce a hybrid structure with a lower energy. the key factors that are required for this "mixing" are, and I am taking this from the wikipedia article Resonance(chemistry) which is a reasonable source on the internet.

  • They can be represented by several correct Lewis formulas, called "contributing structures", "resonance structures" or "canonical forms". The contributing structures are not isomers. They differ only in the position of electrons, not in the position of nuclei.
  • Each Lewis formula must have the same number of valence electrons (and thus the same total charge), and the same number of unpaired electrons, if any.

Please remember that the word resonance makes it sound as if there are distinct states that the molecule is in at any instant- this is not true- Pauling used the word resonance because Heisenberg had used it in a description of the Helium atom. What the molecule is in is a steady state hybrid of all the different contributing forms (canonical forms some people call them)

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10y ago

redistribution of electron that can take place in unsaturated tertialy in conjugated system where pi bond involve called resonance or mesomeric effect .

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8y ago

The polarity is induced in the molecule by the interaction between pi-bonds or between a pi bond and a lone pair of electron present on the adjacent atom are called Resonance effect.

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