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Resonance (chemistry)

In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures (or forms, also variously known as resonance structures or canonical structures) into a resonance hybrid (or hybrid structure) in valence bond theory. It has particular value for…

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Reactive intermediates

Benzene

Quantum mechanical description in valence bond (VB) theory

Charge delocalization

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Resonance (chemistry)

Nodes121
Edges120
Triples6
Avg. degree1.98
Density0.016529
Components1

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resonance structures structure contributing benzene bond double single bonds molecule charge energy atoms two delocalized electrons delocalization valence theory hybrid

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SubjectPredicateObjectConfidenceSrc
linear polyenesinstance ofalthough comparisons of resonance energies computed under similar assumptions and conditions may be chemically meaningful.Molecules with an extended π system0.80text
polyaromatic compounds are well described by resonance hybrids as well as by delocalized orbitals in molecular orbital theory.Resonance vs isomerismResonance is to be distinguished from isomerisminstance ofalthough comparisons of resonance energies computed under similar assumptions and conditions may be chemically meaningful.Molecules with an extended π system0.80text
carbocationsinstance ofreactive intermediates0.80text
free radicals have more delocalized structure than their parent reactantsinstance ofreactive intermediates0.80text
giving rise to unexpected productsinstance ofreactive intermediates0.80text
benzeneinstance ofthe VB concept of localized σ bonds and the MO concept of delocalized π orbitals are frequently combined in elementary chemistry courses.The contributing structures in the VB mo…0.80text

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