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Subject - Organic Chemistry

The term aromaticity describes the properties of organic compounds with a planar molecular structure, with certain conditions of symmetry and electron configuration and which possess a maximum number of non-cumulative double bonds. Compared to the corresponding unsaturated open-chain compounds they are especially stable.

The best known example of an aromatic compound isbenzene (C6H6) which is the basic structure of many aromatic compounds. Aromatic compounds are multiply unsaturated and are relatively inert towards addition reactions. Instead, they are more reactive in substitution reactions.

The Hückel rule states that the number of delocalized π electrons in an aromatic compound has to be 4n+2 (n = 0,1,2,3 ...), i.e. the conjugated electron system must contain 2 or 6 or 10 etc. π electrons.

See also: aromatic compound

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